# Computer Science Principles — The Foundational Concepts of Computer Science **Assessment:** the selected units connect binary representation, Boolean logic, compression and computing's social effects through short explanations and examples. They also contain a contradicted AND substep, a 60-fold video-frame counting error, and misleading statements about storage units and Creative Commons attribution. Use the checked explanations with corrections; this selection doesn't establish the quality of the unread programming or software tutorials. This one note contains Prompts 0–13, the source excerpt register, tested examples, optional learning material, embedded note candidates and three maps. **Complete** describes the prompt chain on the disclosed selection. It doesn't claim a whole-book reading or completion of its activities. Start with Prompt 7 for verdicts, Prompt 6 for executable checks, and Prompt 0 for coverage. ## Prompt 0 — Retrieval and source setup ### Identity, preservation and integrity The native cover and title identify Kevin Hare, *Computer Science Principles: The Foundational Concepts of Computer Science*, with a foreword by Pindar Van Arman. The copyright page explicitly identifies the fourth edition, Yellow Dart Publishing, 2022, and ISBN 9781734554953. It doesn't identify that ISBN's binding or format in the read page; the `print_isbn` field preserves the native edition ISBN without claiming independently verified print binding. No separately identified EPUB ISBN appears in the inspected metadata. The package instead carries ASIN B09S4NK8T1 and a 2022-03-21 date. The bounded Amazon destination lookup failed, so the link stays null instead of claiming current availability. The original-path `stat -f '%Sf'` check reports a missing file. A read-only DriveFS lookup resolves the exact filename and current connector revalidation confirms exact ID, EPUB type and 2,962,056-byte size. A scoped temporary download completes in 0.38 seconds including parsing. SHA-256 is `c84a591d8e55b3076c909cedf3f048565c0c644a3188de1e52dfb1928e926ea8`. All 169 ZIP entries pass CRC checks; all 18 spine documents parse as strict XML. Integrity confirms readable bytes, not correctness of the textbook's claims. No original file, Drive item or Kindle item changes. ### Layer 1 substitution and coverage The EPUB is Layer 1 under spec v2. Successful remote Reader and highlight searches produce no verified Hare target; unrelated Cambridge, Springer and programming articles don't supply your emphasis. The bounded local title/author filename search finds no target import. These searches don't prove whole-library absence. No reader highlights, notes, colors, dates or location URLs are verified. All S excerpts below are system-selected, and your rating, reading dates and opinions remain unknown. **Read complete native text:** title and copyright, Foreword, Software Alternatives, unit 1 (Hardware, Software, Number Systems, and Boolean Expressions), unit 3 (Compressing Data), and unit 9 (Impact of Computing). These seven spine bodies contain 15,483 words. The complete extraction contains about 50,405 body words; extraction isn't reading. **Inspected native pixels:** cover `Image00140.jpg`, binary-to-decimal examples `Image00002.jpg`, NOT gate/table `Image00009.jpg`, and AND gate/table `Image00010.jpg`, all under `OEBPS/`. Full text coverage doesn't imply inspection of every figure. Other figures, media screenshots, audio/video demonstrations and activity outputs remain NE. Generic or incorrect alternative text can't substitute for a figure's contents. **Not evaluated:** the bodies of units 2, 2.5, 4, 5, 6, 7, 7.5 and 8; Appendix—JavaScript Objects; Important Vocabulary; all associated unread examples, references and activities. Spine headings provide the map. There is no finding that these sections lack an explanation, an accommodation or a correction. No AP exam alignment, present exam policy or certification outcome is assessed. Native locations use `CSP-U###-e###`: one-based spine unit and zero-based XML `body.iter()` element index, including the body. Paragraph whitespace is normalized; the quoted words and punctuation match native text. U004 is `OEBPS/text00002.html`, U005 `text00003.html`, U006 `text00004.html`, U009 `text00007.html`, U016 `text00014.html`. S IDs are evidence selections, not Readwise highlights. | Evidence | Exact native excerpt | Location | |---|---|---| | S-01 | “Computer science is a creative field,” | `CSP-U004-e005` | | S-02 | “The physical parts of the computer are known as hardware” | `CSP-U006-e028` | | S-03 | “group them into bunches of eight,” | `CSP-U006-e071` | | S-04 | “The next unit is the kilobyte, which is two to the tenth power, or 1,024.” | `CSP-U006-e083` | | S-05 | “the customer has been shorted” | `CSP-U006-e092` | | S-06 | “The first 32 characters (0-31) were used for teletype machines and are now considered obsolete.” | `CSP-U006-e286` | | S-07 | “The expression A ∧ B is only true if both A and B are true.” | `CSP-U006-e344` | | S-08 | “So if—and only if—A and B are both false then A ∧ B would be false.” | `CSP-U006-e358` | | S-09 | “If an expression contains multiple XOR operators then it will be true when it contains an odd number of true statements.” | `CSP-U006-e366` | | S-10 | “it does not lose any data during compression.” | `CSP-U009-e026` | | S-11 | ““A” could be 0, “B” could be 10, and “C” could be 11.” | `CSP-U009-e044` | | S-12 | “at the level of individual characters,” | `CSP-U009-e059` | | S-13 | “90 minutes of video would contain 2,160 individual images or frames,” | `CSP-U009-e154` | | S-14 | “one second of 4k video takes up 199,065,600 bits,” | `CSP-U009-e160` | | S-15 | “1,411,200 bits per second.” | `CSP-U009-e175` | | S-16 | “requiring or not requiring that attribution be given to the original author.” | `CSP-U016-e073` | | S-17 | “Just because something is legal doesn't make it right.” | `CSP-U016-e077` | | S-18 | “a digital divide characterizes the computing field,” | `CSP-U016-e029` | | S-19 | “Numerous other applications, both free and paid, can perform similar tasks,” | `CSP-U005-e018` | | S-20 | “While related, they are distinct concepts.” | `CSP-U016-e086` | | S-21 | “If you aren't willing to sacrifice any quality then size of the compressed file will not be much smaller than the original.” | `CSP-U009-e013` | | S-22 | “1101 0010.” | `CSP-U006-e096` | ## Prompt 1 — Contract, priors and questions > [!warning] System-inferred reading contract > Understand the selected foundations, check concrete examples, and separate explanatory value from technical accuracy and teaching efficacy. You can correct this purpose. You haven't supplied your starting knowledge, intended course, beliefs or a personal use case; the priors below belong to the analysis. Depth is analytical. Success means you can trace an error to its location, keep a valid principle while correcting its example, and distinguish a proved arithmetic result from a proposed learning outcome. A complete four-row truth table can change the conclusion about a Boolean sentence; student learning data would be needed to assess teaching efficacy. A small compression test can defeat a universal size claim without ranking every codec or file. | Provisional topic | System initial belief | Confidence | Reason | Evidence needed | |---|---|---|---|---| | C01 program model | Useful introductory model | Provisional | Explicit instruction/data distinction | Clear boundaries and examples | | C03 binary conversion | Positional arithmetic should be reproducible | Provisional | A deterministic relation | Execute a conversion and inverse | | C04 storage labels | Decimal and binary units need separate names | Provisional | Unit convention affects comparison | Original standards reference | | C05 ASCII | Character repertoire differs from storage width | Provisional | Codes can occupy wider containers | Original specification | | C07 AND/NOT example | Every input combination matters | Provisional | One false universal substep changes reasoning | Exhaustive truth table | | C11 lossless reduction | Redundancy can permit large savings | Provisional | Repetition doesn't require data removal | Round-trip bytes and lengths | | C12 creative teaching | Interest might support practice | Uncertain | Experience isn't comparative learning evidence | Outcome and access measures | | C13 frame counting | Units must cancel before a result | Provisional | Minutes differ from seconds | Execute dimensioned multiplication | | C16 license categories | Attribution and public-domain tools differ | Provisional | Permission conditions affect reuse | Licensor's current taxonomy | | C17 social effects | Benefits and harms can coexist | Provisional | Different groups bear different effects | Cases with population and time boundaries | **Bias and incentives, system inference:** a reviewer familiar with code can overvalue neat arithmetic and undervalue creative entry points. A publisher and an endorsing foreword writer have reasons to present the book as useful; Van Arman describes his friendship with Hare, not an independent learning study. Neither observation establishes a private motive or a teaching failure. Your incentives and desired conclusions remain unknown. ### Twenty questions Definitions: Q01 distinguishes a program from a file; Q02 separates bit, byte, code point and encoded byte; Q03 asks what positional conversion preserves; Q04 separates GB and GiB; Q05 asks which ASCII controls still have functional uses. Mechanisms and tests: Q06 asks how AND behaves for all four input pairs; Q07 asks where NOT applies in a compound expression; Q08 checks XOR parity beyond two operands; Q09 asks what lossless round-trip equality guarantees; Q10 asks why a prefix-free code has unambiguous boundaries; Q11 asks whether losslessness limits reduction size; Q12 asks what outcomes establish creative teaching success; Q13 checks minutes-to-seconds in frame counts; Q14 asks where bits per pixel enter a video-rate estimate; Q15 asks whether audio-rate formulas include channels. Scope, access and application: Q16 asks whether all six core CC licenses require attribution; Q17 asks whose benefits and harms the closing unit counts; Q18 asks whether low-cost alternatives also meet access and privacy needs; Q19 asks what the unread JavaScript and security units actually teach; Q20 asks how to teach a corrected example without reproducing the error or inventing a learner result. The book's 2022 claims don't change. Evaluative context can: software versions, product prices, browser support, labor statistics, laws and course requirements. This note doesn't assert current values for those conditions. Binary place value, Boolean truth functions and the stated arithmetic inputs don't drift with an app release. ## Prompt 2 — Inspectional map | Native unit | Apparent function from heading | Coverage and confidence | |---|---|---| | 1, Hardware, Software, Number Systems, and Boolean Expressions | Introduces machines, representations and logic | Full text plus three selected figures; evaluated | | 2, Pixels and Images | Image representation | Title only; body NE | | 2.5, Adobe Photoshop | Software tutorial | Title only; body NE | | 3, Compressing Data | Size/fidelity tradeoffs and coding methods | Full text; figures not inspected; evaluated within text limits | | 4, Storing Data: Spreadsheets and Databases | Data tools | Title only; body NE | | 5, Protecting Data: Heuristics, Security, and Encryption | Security and problem-solving | Title only; body NE | | 6, The Internet | Networks | Title only; body NE | | 7, Web Design: HTML and CSS | Web foundations | Title only; body NE | | 7.5, Adobe Dreamweaver | Software tutorial | Title only; body NE | | 8, Programming: JavaScript | Programming | Title only; body NE | | 9, Impact of Computing | Access, tradeoffs, ethics, privacy and IP | Full text; historical/context claims bounded | | Appendix and vocabulary | JavaScript objects and terms | Title/boundary only; bodies NE | **Provisional summary, inferred synthesis:** Hare introduces computing through machines, representations, media, data tools, networks, programming and social consequences. The selected foundations explain how binary patterns can represent numbers and logical states, and why data formats and coding methods matter when storing or transmitting media. The compression unit contrasts lossless reconstruction with deliberate information removal, then uses text, image, video and audio examples. The closing unit treats creativity and collaboration as benefits while discussing unequal access, harassment, privacy and contested impacts. Pindar Van Arman's foreword endorses creative entry points through art; that endorsement has its own voice and evidence limits. The book's method combines short definitions, illustrated examples and named software applications. This review tests a selection of explanations and arithmetic, not the whole tutorial sequence. Several deterministic checks expose correctable mistakes. Those mistakes justify caution with examples but don't establish that the unread units fail or that creative learning itself is ineffective. The rhetorical modes are explain and teach in the selected units; advocate and endorse appear in the foreword and ethical conclusion. The intended starting level appears introductory from the definition of hardware and binary. No native AP curriculum approval is inferred from the publisher's email domain. Hotspots: U006-e358 contains the faulty AND substep; U009-e013 makes a broad lossless-size assertion; e154 and e160 contain dimension-sensitive video numbers; U016-e073 describes license choices. The verified AND figure offers a counterobservation to an exaggerated error claim. Choose a selective deep read because those sections allow concrete verification within this run. Guiding questions Q02–Q16 organize the deeper reading; Q19 sets a stop boundary until more source is read. A future request for programming practice would shift the route to complete unit 8 and its actual figures before assessing code behavior. ## Prompt 3 — Classification and controlled vocabulary This is an introductory technical textbook with practical tutorials and a social-effects unit. The selected method is explanation through representation, examples, activities and analogies. It isn't a research monograph or a measured intervention study. Definitions below paraphrase Hare unless a source ID identifies a quote. Competing uses and operational tests are review inferences. | Term | Author use and source | Competing use; operational meaning | Example / counterexample; risk | |---|---|---|---| | Hardware | Physical components, S-02 | Device abstraction; inspect an actual physical part | Keyboard / algorithm; material object isn't instruction | | Software | Instructions represented as bits, U006-e015 | Data also uses bits; identify executable behavior | Program / saved photo; representation doesn't define purpose | | Bit | Binary distinction, U006-e071 | Physical signal can vary; represent 0 or 1 in model | Boolean value / whole character; model versus implementation | | Byte | Eight grouped bits, S-03 | Historical sizes differ; use eight-bit byte here | 256 patterns / 256 ASCII codes; container versus repertoire | | Binary | Base-two position values, S-22 | Representation isn't a new quantity; convert and invert | 11010010 → 210 / decimal 11010010; notation confusion | | Hexadecimal | Four bits per digit, U006-e126 | A written base; two hex digits encode one eight-bit value | d2 / two arbitrary letters; digit versus byte | | Kilobyte | 1024 in text, S-04 | SI kB versus KiB; state exact bytes | 1024 B = 1 KiB / treating GB as GiB; disputed convention | | ASCII | Character codes, U006-e286/U009-e037 | Seven-bit repertoire in an eight-bit byte; separate code from container | A = 65 / assuming 256 ASCII characters; padding confusion | | Boolean AND | True when both true, S-07 | Bitwise operators differ; enumerate four rows | T AND F = F / iff both false; conjunction error | | NOT | Reverses truth, U006-e358 | Scope matters; negate the computed operand | NOT(T AND F)=T / NOT T AND F; parentheses | | XOR | Exactly one of two; odd parity for chains, S-09 | Exactly one of many differs; specify repeated binary XOR | T XOR T XOR T=T / exactly-one rule for three; arity confusion | | Abstraction | Suppress details to focus, U006-e381 | Omission can hide assumptions; retain required interface | Gate symbol / omitted pixel depth; useful versus invalid omission | | Lossless | Preserve original digital data, S-10 | Original analogue isn't reconstructed exactly; test byte equality | Round trip / irreversible quantization; source-domain confusion | | Lossy | Remove some information, U009-e018 | Perceptual similarity isn't bit equality; state discarded data | Quantization / unchanged decoded bytes; quality subjective | | Prefix-free | No complete codeword prefixes another, S-11 | Variable length alone doesn't suffice; check codebook prefixes | 0,10,11 / 0,01,1; ambiguous boundaries | | Metadata | Information needed to interpret content, U009-e029 | Not always at beginning; document layout | Dimensions / assuming header location universal; format dependence | | Bit rate | Bits per time, U009-e160/e175 | Pixel or sample rate lacks bit depth; carry all factors | PCM sample rate × depth × channels / pixels per second; dimensions | | Privacy and security | Related but distinct, S-20 | Data protection includes several actors; identify collection and safeguards | Limited sharing / secure but excessive collection; conflation | **Category-error watchlist:** container width versus code repertoire is present in ASCII wording; prefix convention versus alleged consumer deception is present in storage wording; frame rate versus frame count is present in video arithmetic; interest versus demonstrated learning is a risk in the foreword. Legal permission versus ethical judgment is distinguished in S-17. Absence of evidence versus evidence of absence remains a review risk for every unread unit, so those units receive NE. Correlation versus causation matters for social-impact claims; original studies aren't evaluated here. Medical, theological and identity-as-causal categories aren't material to the tested arithmetic. ## Prompt 4 — Claims and dependencies EA = explicit author statement; IA = inferred author premise; Q3P = another voice; RI = review inference; UI = uncertain interpretation. Van Arman's foreword claims stay Q3P. No UI assertion becomes a finding. **C18 is a review proposal, not Hare's sentence.** | ID | Voice, type and scope | Source and expected evidence | Nonvacuous check or falsifier; question | |---|---|---|---| | C01 | EA definition: computer processes data under instructions | U006-e010; explicit introductory definition | N/A empirical falsification; distinguish data from instructions, Q01 | | C02 | EA mathematical definition: byte groups eight bits | S-03; stated convention | N/A probability; enumerate 2^8 patterns under this convention, Q02 | | C03 | EA mathematical: binary uses powers of two for position | U006-e096/S-22; worked representations | Deterministic conversion disagreement would expose an example error, Q03 | | C04 | EA standards/evaluative: GB truly means 2^30 bytes, so decimal vendors short buyers | S-04–05; requires standard and advertised terms | Primary unit convention and accurate decimal label defeat blanket accusation, Q04 | | C05 | EA technical: ASCII characters use eight bits | U009-e037; requires encoding specification | Seven-bit repertoire with byte padding narrows the claim, Q02/05 | | C06 | EA mathematical: AND is true only when both operands are true | S-07; truth function and figure | N/A empirical probability; full four-row table verifies model, Q06 | | C07 | EA mathematical example: AND is false iff both operands are false | S-08; should match C06 | Mixed T/F or F/T makes AND false and defeats iff, Q06/07 | | C08 | EA mathematical: repeated binary XOR returns odd parity | S-09; binary XOR composition | N/A probability; three-input enumeration checks model, Q08 | | C09 | EA definition: lossless preserves digital data | S-10; byte equality after round trip | N/A as definition; any unequal round trip isn't lossless for that input, Q09 | | C10 | EA mathematical example: 0,10,11 form an unambiguous prefix-free code | S-11; prefix inspection/decoding | Complete-word prefix collision would defeat codebook, Q10 | | C11 | EA generalization: no sacrificed quality means compressed size isn't much smaller | S-21; requires explicit format and distribution | Large reversible reduction on repetitive input weakens generality, Q11 | | C12 | Q3P predictive teaching claim: creative applications help readers improve capabilities | U004-e005/e028/e038; endorsement and experience | Controlled learning/access outcomes with no improvement would weaken prediction, Q12 | | C13 | EA arithmetic: 90 minutes at 24 frames/s yields 2160 frames | S-13; dimensioned multiplication | Execute 90×60×24; unequal result contradicts number, Q13 | | C14 | EA rate estimate: one second of 4K at 24 fps takes 199065600 bits | S-14; needs bits/pixel and format | Change pixel depth under otherwise identical inputs; different rates defeat unqualified value, Q14 | | C15 | EA arithmetic: stereo 44.1kHz 16-bit PCM gives 1411200 bits/s | S-15/U009-e175; sample/depth/channel product | Deterministic calculation; N/A subjective probability, Q15 | | C16 | EA classification: six main CC licenses can require or not require attribution | S-16; requires licensor taxonomy | All six requiring BY contradicts option within that set, Q16 | | C17 | EA normative: evaluate social tradeoffs beyond legal compliance | S-17/U016-e042–050; ethical argument | N/A empirical falsification; compare consequences and affected groups, Q17 | | C18 | RI method: enumerate cases and dimensions before trusting a worked example | C07/C13 tests; review procedure | N/A proposal; a test can miss what its inputs don't cover, Q20 | **Dependency outline, inferred reconstruction:** representation definitions C01–03 support number and logic examples C06–10. Compression definitions C09–10 support media calculations C13–15, which need explicit dimensions. Ethical reflection C17 depends on specifying people and consequences, not on every compression number. C04/C05/C07/C13/C14/C16 can fail independently without refuting computing fundamentals. The bridge from creative exposure to improved skill (C12) needs learning evidence beyond an endorsement. That pedagogical bridge is the weakest inferential link in the read selection; measured participation and transfer would repair it. Deterministic errors need correction, not a better learning study. ## Prompt 5 — Quantitative policy and calibration Use arithmetic where inputs define a reproducible calculation. Don't attach Bayesian percentages to a definition, truth table or unit conversion. A falsified worked step isn't merely less probable after a failed check; it is false for the tested model and inputs. Empirical learning and population-effect estimates need datasets and denominators the selected text doesn't supply. | Claims | Initial stance | Evidence and update | Posterior treatment | |---|---|---|---| | C01–03, C06, C08–10, C15 | Definitions or deterministic relations | Text, figures and executed selected relations | N/A subjective confidence; state assumptions/results | | C04 | Storage labels need distinct units | NIST confirms decimal GB and binary GiB | Strong decrease for blanket accusation; repaired convention supported | | C05 | Width and repertoire differ | RFC 20 specifies seven-bit ASCII in eight-bit byte | Narrow statement, not total rejection of stored-byte example | | C07/C13 | Examples should follow rules | Counterexamples and multiplication contradict numbers | Reject exact statements, retain corrected relation | | C11 | Redundancy can permit large reduction | Repeated input round trip contrasts random input | Decrease for broad restriction; no universal compression ratio | | C12 | Creativity might support learning | Foreword testimony without comparative outcomes | No measured update; plausible but not established | | C14 | Video rate needs all dimensions | 24-bit hypothetical gives different result | Decrease for unqualified number; input format remains unresolved | | C16 | Core licenses differ from public-domain tools | Licensor lists BY in all six | Reject attributed option within six; retain broader sharing discussion | | C17/C18 | Normative/method proposal | Reasoning and local tests | N/A population posterior | Calibration warnings: false precision is high risk for inferred teaching efficacy and historical social statistics; double-counting is high if chapter prose, recap and figures count as independent sources; proxy substitution is high if interest becomes mastery. Tiny samples and selection limit compression benchmarks: two synthetic inputs are counterexamples, not a file-population study. Base-rate neglect and publication bias aren't evaluated through unread studies. P-values and statistical effect sizes aren't part of this run. The calculations below give exact outputs within declared assumptions, not ranges disguising subjective estimates. ## Prompt 6 — Analytical reading and executed examples ### Front matter and software alternatives — complete text Van Arman contrasts his own rigid textbook experience with Hare's creative approach. He describes robotic painting, imperfect reception and collaboration with Hare. His account can illustrate a route into computing but can't establish that this textbook produces better outcomes than another. He reports a critic's negative aesthetic judgment as well as recognition of the painting as art; that is a counterobservation to a uniformly celebratory reading. The foreword's billion-dollar cryptocurrency flourish isn't a financial outcome claim this review endorses or tests. Software Alternatives acknowledges subscription/payment barriers and names alternatives (S-19). That is an access strength, not proof every alternative offers equivalent accessibility, privacy, format support or current availability. No software purchase, package installation or present product recommendation occurs. The selected text's FOSS language mixes price and source access; the review keeps those concepts distinct without evaluating each license. ### Unit 1 — complete text; selected figures Hare's desktop/bookshelf analogy connects working memory with storage, and his binary positions give a reproducible conversion. Analogies don't literally specify all hardware: a CPU doesn't alone execute every possible device operation, and a clock rate isn't identical to completed commands per second. Those technical simplifications aren't independently evaluated through device specifications in this review. **Executed representation example:** native text gives `1101 0010` (S-22). Removing the grouping space, positional arithmetic yields 128+64+16+2 = **210**, represented in hexadecimal as **d2**. A program computes `int('11010010', 2)` as 210 and the hexadecimal conversion as `0xd2`. The viewed binary figure separately shows 1001=9, 1111=15 and 01011100=92. Those displayed sums are coherent. No learner is claimed to have solved them. The storage-unit lesson needs a convention correction. [NIST's primary binary-prefix reference](https://physics.nist.gov/cuu/Units/binary.html) distinguishes 1 GB = 10^9 bytes from 1 GiB = 2^30 bytes. A decimal capacity doesn't itself show a customer received less than an advertised decimal GB quantity. Hare's statement collapses conventions into a consumer accusation (C04); the discrepancy between displayed quantities can be real without proving deception. ASCII likewise needs separate code repertoire and storage width. [RFC 20](https://www.rfc-editor.org/rfc/rfc20.html) specifies seven-bit ASCII embedded in an eight-bit byte with zero high bit. That supports a byte storage example but corrects identifying ASCII itself as an eight-bit repertoire. Its table includes tab and line feed; the native claim that the first 32 codes are now obsolete (S-06) is too broad. This isn't an argument that every historic control retains every original function. **Executed Boolean example:** S-07 defines AND correctly. In the NOT paragraph, S-08 says AND is false iff both operands are false; the mixed-input cases contradict that substep. The beginning of the NOT paragraph correctly defines reversal, so the error doesn't invalidate NOT itself. The viewed native AND table agrees with the corrected result, and the viewed NOT table reverses one input correctly. | A | B | A AND B | NOT(A AND B) | Both A and B false | |---|---|---|---|---| | False | False | False | True | True | | False | True | False | True | False | | True | False | False | True | False | | True | True | True | False | False | All four rows run in the local test. **Two of four** defeat the native iff clause. Repair: AND is false when at least one operand is false; NOT(AND) is true for those three rows. The XOR discussion explicitly distinguishes two-input exactly-one from odd parity with multiple XOR operators (S-09); don't criticize it as applying exactly-one to every chain. ### Unit 3 — complete text; figures not inspected The distinction between captured digital data and the preceding analogue signal protects the lossless definition from an impossible guarantee about analogue reproduction. Hare also limits Huffman's efficiency statement to individual characters (S-12), and the review preserves that restriction. It doesn't claim Huffman is the best possible compressor for every file or prove its optimality theorem from an unread original paper. **Executed lossless counterexample, review-designed:** zlib compresses 10,000 bytes of repeated `A` to **34 bytes** and decompresses to exactly the same 10,000 bytes. A reproducible random-byte comparison, seed 1729, compresses 10,000 bytes to **10,011 bytes**. These inputs show that reversible reduction can be large and that compression can increase a file's size. They don't compare all codecs or represent a file-population average. C11's no-quality-loss restriction needs a redundancy condition. The book's later discussions of redundancy and dictionary coding support that repair from within its own selection. Prefix-free example 0,10,11 has no complete codeword prefixing another. For the review-designed string ABC, the encoded sequence is 01011; decoding reads 0→A, 10→B, 11→C. This is a transparent derivation, not an independently executed decoder benchmark. A different variable-length set such as 0,01,1 lacks that property. Metadata and escape conventions still matter for file formats and dictionary substitutions. **Executed frame calculation:** with the book's 90 minutes and 24 frames per second, `90 × 60 × 24 = 129,600 frames`. The native 2,160 equals 90×24 and omits seconds per minute. It is smaller by a factor of **60**. The principle of independently compressing each frame survives the numerical correction; this error doesn't refute intraframe compression. **Executed rate calculation under declared assumptions:** 3840×2160×24 = 199,065,600 **pixels per second**. This equals the book's numerical bit-rate result only under one bit per pixel. For a hypothetical uncompressed 24-bit RGB stream at the same dimensions and frame rate, multiplying by 24 bits per pixel yields **4,777,574,400 bits/s**, before audio and other overhead. Hare doesn't state a one-bit format in that video paragraph. The critique identifies the missing representation factor; it doesn't claim the book explicitly chose 24-bit RGB or that every real 4K signal uses that format. Actual compressed rates need codec and content settings. The PCM example includes a channel factor: 44,100 samples/s ×16 bits/sample ×2 channels = **1,411,200 bits/s**, matching S-15. The local program confirms that product. Perception claims about shades and hearing thresholds aren't independently evaluated from original experiments; don't convert them into universal sensory limits or clinical guidance. Image run-length examples and Huffman graphics aren't pixel-inspected in this run, so their detailed encodings remain NE. ### Unit 9 — complete text The closing unit names class, geography, disability, harassment, race and gender as access issues (S-18). It considers social media, transport platforms and virtual reality through both benefits and harms, and it states that a full tally of ride-sharing effects exceeds this book's scope. That limitation matters: the discussion introduces tradeoffs without claiming a complete comparative study. Historical percentages, forecasts, estimated redevelopment costs and unnamed studies don't become current measured facts here. The intellectual-property discussion describes tensions between protection and sharing. One concrete taxonomy claim is mistaken: S-16 says the six main CC licenses can require or not require attribution. [Creative Commons' own six-license descriptions](https://creativecommons.org/cc-licenses/) include BY in all six. Its separate public-domain tools shouldn't be conflated with that six-license set. This is a classification check, not individualized legal advice, and no protected work is republished. Hare separates legality from ethics (S-17) and privacy from security (S-20). Those distinctions support questions about power, collection and safeguards. The discussion of VPNs, permissions, law, prices and security roles is a 2022 snapshot; this review doesn't turn it into verified present operational advice. The final assertion that a reader has gained skill after reaching the end is a pedagogical claim, not evidence that you completed the exercises or demonstrated transfer. ### Evidence ledger, independence and stopping criteria | Evidence | Claims | Type and source | Independence; limit | |---|---|---|---| | E1 | C01–10/C15 | Native explanation and four viewed figures | One textbook package; figures can expose internal contradiction | | E2 | C12 | Van Arman's foreword | Another voice with disclosed friendship; not learning-outcome study | | E3 | C03/C07/C13/C14/C15 | Executed conversion, complete table and products | Re-derived checks independent of textual assertion; assumptions bounded | | E4 | C11 | zlib round trips on two specified inputs | Executed counterexample; no prevalence claim | | E5 | C04 | NIST primary prefix reference | External authoritative convention; not storage-vendor behavior audit | | E6 | C05 | RFC 20 primary specification | External repertoire/container distinction; not every implementation tested | | E7 | C16 | Licensor's six-license taxonomy | External primary classification; no individualized legal outcome | Three external primary sources and executed local checks supply independent tests of selected statements. The foreword supplies an additional voice but isn't independent evidence of learning. Independent checks tell against C04, C07, C13 and C16 at their stated scopes, and limit C05/C11/C14. No reviewed original social-science study supplies a population estimate. Completion before Prompt 7 requires exact locations, the four-row table, declared rate dimensions, explicit image coverage and source-backed repairs; those are present. Future reading should inspect unit 8 in full before evaluating programming instruction and unit 5 before evaluating security mechanisms. Attention demand is high for representations and diagrams, moderate for the narrative effects unit; no completion time is predicted. ## Prompt 7 — Fair criticism and verdicts Grade A denotes direct strong independent empirical support; B substantial but limited; C suggestive; D weak or mismatched; F contradicted or materially misleading at the stated scope. N/A applies to definitions, mathematical relations and proposals whose correctness doesn't require an empirical probability. An erroneous mathematical instance can receive F when execution contradicts it; the N/A label doesn't shelter wrong arithmetic. | Claim | Grade | Current conclusion, objection and repair | |---|---|---| | C01 | N/A | Introductory definition; don't identify every stored bit pattern with instructions | | C02 | N/A | Eight-bit byte convention is coherent; distinguish 256 patterns from character repertoire | | C03 | N/A | Executed 11010010→210→d2 matches positional rule | | C04 | F | Blanket true-GB/shorted-buyer conclusion conflicts with primary convention; use GB/GiB and advertised terms | | C05 | D | Byte storage example is usable; ASCII repertoire is seven-bit, not inherently eight-bit | | C06 | N/A | Correct truth rule and viewed table; all four cases checked | | C07 | F | Two mixed cases contradict iff; repair to false if at least one operand is false | | C08 | N/A | Odd-parity claim preserves distinction from exactly-one-of-many | | C09 | N/A | Correct digital round-trip definition; no promise to recover analogue detail | | C10 | N/A | Three-codeword example has no prefix collision; don't extend to arbitrary variable-length codes | | C11 | D | Repeated-data round trip contradicts general size restriction; qualify by redundancy and format | | C12 | C | Foreword offers experience and endorsement; learning gains need evidence of transfer | | C13 | F | Native count omits 60 seconds/minute; corrected result 129600 frames | | C14 | D | Numerical product is pixels/s unless one-bit pixels specified; include bits/pixel and actual encoding | | C15 | N/A | Correct stereo PCM product with declared sample rate, depth and channels | | C16 | F | All six main CC licenses require attribution; distinguish public-domain tools | | C17 | N/A | Ethical judgment includes tradeoffs; no universal empirical score follows | | C18 | N/A | Review method, not measured learning intervention; inputs bound every check | Distribution: **A 0; B 0; C 1; D 3; F 4; N/A 10**. The pattern reflects a technical selection with many definitions and deterministic relations. It isn't a whole-book error rate or a rating. Primary checks and executable cases determine specific corrections; no invented statistical posterior accompanies them. **Strongest reconstruction, review inference:** give beginners a vocabulary, let them see useful creative applications, connect representation to data handling, and finish by examining societal responsibilities. That project doesn't require every software tool to remain current or every application to improve every learner. The evaluated failures are correctable details, with one pedagogical evidence gap; they don't refute the project's possibility. **Source counterobservations:** the AND figure and earlier AND definition are correct; NOT's opening definition is correct; multi-input XOR explicitly uses parity; Huffman efficiency has a symbol-level qualifier; PCM distinguishes one channel from stereo; analogue-to-digital capture precedes the lossless guarantee; ride-sharing's full effects tally is outside scope; benefits and harms appear together; software alternatives address cost. These observations prevent overstating the criticism. **Warranted reasoning problems:** C04 equivocates between conventions and then infers a consumer loss; C13 makes a dimensional arithmetic mistake; C16 collapses separate permission categories. Those specific mechanisms justify correction. No claim of dishonesty, ideological motive or whole-text incompetence follows. C12's endorsement is incomplete support, not automatically a fallacy merely because an artist knows the author. C14's omitted format can be repaired by specifying bits per pixel; the repair costs the rhetorical simplicity of a single universal number. **Rivals and repairs:** creative projects might increase interest but need other instruction for mastery; measured efficacy can differ across access conditions. Compression performance depends on redundancy and format overhead, not simply lossless/lossy labels. Social outcomes depend on institutions and distribution of costs, not merely technological capability. These are review hypotheses and scope checks. No experiment here settles student outcomes or technology's aggregate social effect. ## Prompt 8 — Systems and historical context The 2022 edition uses named desktop applications alongside representation and web/programming topics. That combination connects concepts to artifacts beginners recognize, while tying some instructions to vendor interfaces, hardware and subscription access. Prices and menus can age; powers of two and logic do not. No current app compatibility or AP requirement is inferred from a 2022 chapter heading. Documented lineage in the read text includes George Boole for Boolean logic, David Huffman for coding, Lempel and Ziv for dictionary compression, and Van Arman's computational-art experience. Original historical papers weren't read. RFC 20 and NIST enter as primary verification, not claims that Hare explicitly followed those documents. Modern consent, privacy-by-design and accessibility comparisons would be conceptual convergence unless influence were documented. Hare is the named author; no current biography, employer or credentials are independently checked. Native publisher and foreword information establish publication and voice, not authority over all technical details. The text's tools and examples assume some device access. Software Alternatives recognizes financial constraints; unit 9 explicitly discusses unequal access and harmful impacts, so criticism that the book presents computing as uniformly beneficial would misdescribe the selected closing unit. Confirmed adjacent notes are [[Coders — The Making of a New Tribe and the Remaking of the World]] and [[Close to the Machine — Technophilia and Its Discontents]]. They supply navigation to labor and lived experience questions. This session doesn't reread their source books or use their reviews as independent evidence for a technical claim. The existing [[1. Projects/Book Review Completion/index]] carries batch navigation; this worker doesn't edit it. ## Prompt 9 — Inclusion, access and reading demands **Source strengths:** unit 9 names structural barriers involving broadband, geography, income, racial bias, gender, disability and harassment. It gives affected people roles as creators and users, not only consumers of products. Software Alternatives supplies multiple possible cost routes. These are concrete textual inclusions, although they don't demonstrate that every tutorial or classroom offers accessible participation. **Observed accessibility limit:** inspected HTML image references include generic Image text and automatically generated descriptions that call gate diagrams a clock or a cell phone. Those descriptions don't communicate the truth table. This is a native markup observation for inspected references, not a whole-EPUB accessibility certification. Uninspected images remain NE. Binary and truth tables should have equivalent text, and no practice should require color vision, a mouse, speech or timed performance to show the logical relation. | Context | Transfer mechanism | Limit and review adaptation | |---|---|---| | Limited device or paid-software access | Cost constrains tutorial participation | Use paper/text representation checks; product equivalence unverified | | Screen-reader or low-vision use | Picture-only data can hide required inputs | Supply labeled tables and equations; inspect actual figure descriptions | | Motor or fatigue constraints | Tool interaction can compete with conceptual task | Offer typed, dictated or untimed responses; don't infer mastery from click speed | | Multilingual or cross-cultural audience | ASCII and application examples can center English/US contexts | Separate ASCII history from language coverage; expand examples without claiming native cultural universality | | Learners with different sensory perception | Universal perceptual limits can erase variation | Keep compression/quality judgments bounded; no diagnostic inference | The adaptations are RI proposals, not verified features of every chapter. The native statement that everyone has ten fingers and shares the same preschool numeracy history (U006-e271) overgeneralizes physical and educational experience; arithmetic doesn't require that assumption. Unit 9's gender and access statistics are historical attributed figures, not current values verified here. The review doesn't manufacture demographic representation in unread chapters. Reading level: prose uses short explanations and familiar analogies; mathematical notation, units, gate diagrams and codebooks create a separate reference burden. A readable sentence can still teach a mistaken condition. Image alternative text and explicit assumptions affect comprehension beyond syntax. Supplementation should begin with primary notation/format references for the target task, then actual learner feedback—not an assumed preference profile. You haven't supplied performance or accessibility needs this run. ## Prompt 10 — Embedded notes pipeline Fleeting questions: inspect the source figures behind image coding before grading them; read the full programming unit before assessing JavaScript pedagogy; separate instructional interest from transfer. They remain questions here, not new tasks. The six labels below are embedded anchors and proposed standalone titles if future authorization permits promotion. No separate notes or reciprocal MOC edits occur. Each literature/permanent pair links both ways inside this canonical note. ### LN1 — The NOT paragraph contains an AND substep error S-07 and the viewed AND table define conjunction correctly; S-08 contradicts two mixed-input cases. The beginning of the NOT definition stays correct. Link: [[#PN1 — Enumerate boundary cases before accepting a rule]]. Adjacent source route: Prompt 6's complete four-row table. ### PN1 — Enumerate boundary cases before accepting a rule **RI, not Hare's sentence:** when a finite rule has few inputs, list every combination and compare the prose condition with the result. Confidence: direct support for this two-input Boolean case. Scope and conditions: exhaustive truth tables work for a specified finite model; a few selected inputs don't establish all cases in a larger space. Derivation: [[#LN1 — The NOT paragraph contains an AND substep error]]. ### LN2 — A frame count needs a time-unit conversion S-13's 90-minute video example omits the factor of 60; the executed count is 129,600 frames. Link: [[#PN2 — Carry units through every media calculation]]. Adjacent source route: Prompt 6's audio/video comparison. ### PN2 — Carry units through every media calculation **RI, not Hare's sentence:** write frames/second, seconds/minute and bits/pixel beside factors before multiplying. Confidence: directly supported by the corrected frame count and stated hypothetical rate. Scope and conditions: raw rates require representation assumptions; compressed file sizes need codec, duration and content settings. Derivation: [[#LN2 — A frame count needs a time-unit conversion]]. ### LN3 — Byte equality and compression size are separate checks S-10 defines losslessness while S-21 restricts possible savings. Repeated and random synthetic inputs show equal round trips with different size behavior. Link: [[#PN3 — Test preservation separately from efficiency]]. Adjacent source route: the redundancy discussion at U009-e048 and the executed receipt. ### PN3 — Test preservation separately from efficiency **RI, not Hare's sentence:** verify decoded bytes against input before comparing stored size. Confidence: direct support for two specified zlib inputs; broader codec performance unmeasured. Scope and conditions: equality is relative to the original digital bytes; it doesn't establish perceptual quality, analogue fidelity or security. Derivation: [[#LN3 — Byte equality and compression size are separate checks]]. Structure/navigation stays in this note's prompt map and the confirmed [[Coders — The Making of a New Tribe and the Remaking of the World]] adjacency. **Do not attribute to Hare:** C18; all three permanent-note principles; review-designed zlib and RGB inputs; cross-domain analogies; access adaptations; experiments; current primary-source corrections; a claim about your learning, intent or performance. Source claims, foreword voice and reviewer conclusions retain their separate labels. ## Prompt 11 — Optional teaching pack **Inactive proposal:** beginner audience, with no assumed course enrollment or completed learner activity. Objective: evaluate a compound Boolean expression and a dimensioned frame count, then explain the difference between preservation and efficiency. Prerequisites: true/false, addition/multiplication, and minutes/seconds. Vocabulary: AND, NOT, bit, frame, lossless. This pack uses the tested selection, not the unread JavaScript unit. **Whole worked example:** take A=True and B=False. AND requires both true, so A AND B=False. NOT reverses that result, so NOT(A AND B)=True. The book's faulty iff clause would miss this false conjunction because A isn't false. The corrected truth table supplies the rule. This example and all four cases executed in Prompt 6; execution verifies model behavior, not a learner's understanding. Next connect to media: 90 minutes×60 seconds/minute×24 frames/second=129,600 frames. Cancel the time units and keep frames. Compare the correct stereo PCM product, which includes channels, with a video product that needs bits/pixel. No legal, social or perceptual belief is required to perform these calculations. **Practice, no invented response:** evaluate A=False, B=True; then count frames for an invented 2-minute clip at 30 fps. Write the units first. Answer key: conjunction False, negated conjunction True; 2×60×30=3,600 frames. A result of 60 frames signals the missing time conversion; a result that negates A alone signals misplaced parentheses. Give feedback about the missing relation, then let the learner retry. Discussion questions: why doesn't the correct figure excuse an incorrect sentence? Why can a compressor preserve every byte and still shrink one file while expanding another? What information would a bitrate claim need before it guides a real transfer? Which choices require evidence beyond arithmetic? Assessment options: explain the mixed-input counterexample, produce all four rows, or audit the dimensions aloud or in text. A correct copied table doesn't prove independent transfer; use a changed input after a pause if the learner chooses. Reflection asks which assumption changed the result, not for a personal story. Future reading is the actual target unit and its figures, followed by the relevant primary standard; no extra lesson delivery occurs. Facilitator cautions: disclose selective text/image coverage, don't teach S-08 or S-13 as correct, don't turn unverified sensory thresholds into universal limits, and don't use a tool tutorial as proof of employment skills. Access options include text tables, untimed work, keyboard/dictation choices and no color-only information. A multicultural adaptation can use a clip the learner chooses without requiring knowledge of US institutions or a paid vendor tool. All adaptations remain review proposals. ## Prompt 12 — Optional actions, experiments and drift **Most likely misuse:** present the correction list as a whole-book verdict, or assume that executing examples proves your learning. Avoid both. Consider a corrected text-only example; defer assessments of unread tutorials; keep exact licenses, formats and units attached to practical decisions. PARA: this canonical review belongs in Archives because it records completed analysis. Concept candidates could enter Resources only after requested promotion. No active Project or Area change follows without your chosen use, and this run creates none. No tasks, schedules, Reader publication or classroom experiment begins. | Inactive experiment | Claim/PN and hypothesis | Proposed action and measure | Duration, stop and review | |---|---|---|---| | E1 | C18/PN1: enumeration exposes a prose-rule mismatch | Use a small invented truth function; compare complete table with stated condition | One optional practice; stop for overload; review immediately if you choose to do it | | E2 | C13/PN2: explicit units prevent a missed conversion | Solve two invented media counts with units, then compare against a calculator | One optional practice; stop if representation is unspecified; review after chosen attempt | | E3 | C11/PN3: round-trip and size checks answer different questions | On harmless synthetic bytes, compare decompression equality and sizes | One optional local test; no personal files or transfers; review recorded results | No participant is studied covertly. If a later activity involves someone else, explain the purpose and seek their choice. The executed source-verification examples already have results; these future proposals don't borrow those results as learner outcomes. Decision rules: adopt a corrected deterministic result within its stated inputs; adapt a bitrate formula when a different format changes bits/pixel; reject the erroneous iff and frame count; defer compression-population rates and teaching efficacy. A failing transferred test revises PN1's coverage assumptions, PN2's units/format conditions, or PN3's preservation check; it doesn't justify deleting an original source. Drift: truth functions, integer base conversion and fixed input products don't need recurring review. Tool-specific prices/menus, course rules, laws, forecasts and current social statistics need rechecking against the relevant vendor, course authority, regulator or original research before a future consequential use. No monitoring cadence or expiration reminder is activated. The trigger is a changed use case or edition, not elapsed time alone. ## Prompt 13 — Embedded visual synthesis Green marks the central practice, blue concepts, orange checks and purple uncertainty/connections. Labels and text alternatives carry the meaning without color. Dashed arrows mark inferential bridges. These three maps remain inside the note; no Excalidraw file is created. ### Map 1 — Selected foundations and coverage ```mermaid flowchart LR T[Understand representations and consequences] --> B[Binary and Boolean rules C03 C06] T --> C[Lossless and lossy C09] C --> M[Media calculations C13 C15] T --> E[Computing tradeoffs C17] B --> K[Execute cases and units C18 RI] T -. not read .-> U[Programming and tool tutorials NE] classDef thesis fill:#d8efdc,stroke:#256b35,color:#111; classDef concept fill:#dbeafe,stroke:#24579c,color:#111; classDef take fill:#ffedd5,stroke:#a75412,color:#111; classDef uncertain fill:#ede0f7,stroke:#734298,color:#111; class T thesis; class B,C,M,E concept; class K take; class U uncertain; ``` Purpose/layout: left-to-right selected concept route, with the NE node separate. Text alternative: binary and logic connect to compression/media; social effects require different evaluation. The programming/tool route is unread and has no verdict. ### Map 2 — A corrected Boolean evaluation ```mermaid flowchart LR A[A equals True] --> G[AND C06] B[B equals False] --> G G --> F[Conjunction equals False] F --> N[NOT reverses result] N --> T[Result equals True] G -. contradicts iff clause .-> X[Native substep C07 S-08] classDef thesis fill:#d8efdc,stroke:#256b35,color:#111; classDef concept fill:#dbeafe,stroke:#24579c,color:#111; classDef take fill:#ffedd5,stroke:#a75412,color:#111; classDef uncertain fill:#ede0f7,stroke:#734298,color:#111; class T thesis; class A,B,G,F,N concept; class X uncertain; ``` Purpose/layout: left-to-right one mixed-input row. Text alternative: True AND False is False, and negating the conjunction gives True. The contradictory native substep appears as a warning branch, not an operative rule. S-07 and the viewed AND table support the correction. ### Map 3 — Verification and independent evidence ```mermaid flowchart TD S[Native selected claims] --> R{Type of claim?} R --> D[Definition or formal rule] R --> O[Outcome or broad prediction] D --> T[Enumerate cases and dimensions RI] D --> P[Read primary conventions] P --> N[NIST RFC20 CC taxonomy] O -. not established by endorsement .-> L[Learning and population outcomes NE] T --> K[Correct example within stated inputs] classDef thesis fill:#d8efdc,stroke:#256b35,color:#111; classDef concept fill:#dbeafe,stroke:#24579c,color:#111; classDef take fill:#ffedd5,stroke:#a75412,color:#111; classDef uncertain fill:#ede0f7,stroke:#734298,color:#111; class S thesis; class D,O,P,N concept; class T,K take; class R,L uncertain; ``` Purpose/layout: top-down evidence decision tree. Text alternative: formal claims receive deterministic checks and relevant primary conventions; broad outcomes need separate research. A foreword endorsement doesn't establish learning gains. This is a review workflow, not a claim Hare specifies it. Idea Compass: **Parents**—Boolean algebra, positional notation, information coding; documented source names, original papers unread. **Children**—PN1 case enumeration, PN2 units, PN3 preservation versus efficiency, inactive transfers. **Friends**—[[Coders — The Making of a New Tribe and the Remaking of the World]] and [[Close to the Machine — Technophilia and Its Discontents]], verified navigation without new corroboration. **Competitors**—alternative code conventions, different compression formats and empirical teaching comparisons; not independently compared as full books. Omitted visuals: no timeline because the selection doesn't require a historical chronology; no causal loop because no measured feedback model is established; no stakeholder diagram that invents participant identities; no detailed Huffman tree or image decoding map because the relevant native figures weren't inspected. The maps don't imply coverage or performance beyond the text and tests. ## Session completion check Prompts 0–13 execute in order and produce usable sections. None are skipped or remaining; next prompt is null. Layer 1 file substitution, qualitative calibration and embedded note/visual candidates are explicit adaptations to unavailable verified reader emphasis and the one-note requirement. The older two-file/MOC/standalone-note defaults yield to the user's instruction. The canonical spec remains [[6. Templates/Books/Work the Book]]; this note executes it without copying a template appendix. Highest-consequence unassessed material is the full programming/security tutorial content and its figures; next are original outcome/perception studies; then current product, course and law information. All remain NE. System-inferred purpose, hypotheses, access adaptations and transferred examples don't become Courtney's opinions, reading dates or performance. No rating is invented. Amazon destination identity remains unverified after a bounded lookup. Native excerpts, selected source integrity, YAML and structural audits can be verified locally. Installed Markdown doesn't establish live Obsidian rendering or Sync. Root inventory/log updates and temporary-source cleanup remain separate gates; the Drive original stays unchanged.