Simply Logical
Simply Logical by Peter Flachby Peter Flach
Shares rank 25 of 28 computer science textbooks by recommenders
Two commenters recommend it as a logic programming book, and one notes that a PDF copy is easy to get.
Two commenters recommend it as a logic programming book, and one notes that a PDF copy is easy to get.
2 people gave an opinion
- recommend it
- 2
- criticize it
- 0
- approval share
- 100%
Recommended in 2 of 13 months
- November 2025: not recommended
- December 2025: not recommended
- January 2026: recommended
- February 2026: not recommended
- March 2026: not recommended
- April 2026: not recommended
- May 2026: recommended
- June 2026: not recommended
- July 2026: not recommended
- August 2026: not recommended
- September 2026: not recommended
- October 2026: not recommended
- November 2026: not recommended (month in progress)
Why it doesn’t carry the badge
- 2 people recommend itNeeds 10 or more, not met.
- Nobody criticizes itNeeds 2 to 1 or better, met.
- Recommended in 2 of 13 monthsNeeds 4 or more, not met.
The same three rules apply to every product, and the badge can’t be bought. How the badge works
What people say about it
The reasons people give, with the number of comments that give each one. Open a reason to read what they said.
Why people recommend it
Each mark is one comment
Recommended by Hacker News commenters
“I can recommend "Simply Logical".”
Comment from 16 Jan 2026 in “My Gripes with Prolog” PDF easy to obtain
“you can get a PDF just fine.”
Comment from 22 May 2026 in “Chess Invariants”
Other computer science textbooks people recommend
The four most recommended other computer science textbooks, with the same counts for each, so you can compare like for like. The tick on each bar marks the 2 to 1 line the badge needs.
| Product | Recommend | Criticize | Approval | Months | Owned | Badge |
|---|---|---|---|---|---|---|
| Structure and Interpretation of Computer Programsby Abelson and Sussman | 55 | 5 | 92% | 12 | — | Approved |
| The Art of Computer Programmingby Donald E. Knuth | 28 | 6 | 82% | 10 | — | Approved |
| Structure and Interpretation of Computer Programsby Abelson and Sussman | 12 | 0 | 100% | 9 | — | Approved |
| Quantum Computation and Quantum Informationby Nielsen and Chuang | 12 | 0 | 100% | 3 | — | — |
| Simply Logicalby Peter FlachThis page | 2 | 0 | 100% | 2 | — | — |
What people said
All 2 comments that mention it, newest first. Each links to the original comment.
“you can get a PDF just fine.”
“I can recommend "Simply Logical".”
Counts come from 1,795,640 Hacker News comments, November 2025 to November 2026. How we count. Report a mistake.