STstratos123·Sep 4, 2026
encode mathematical reasoning in a way that can’t be fooled.
I would be a bit careful asserting that in full generality, given https://github.com/James-Hanson/junk-theorems-in-lean
In Formalizing Fermat's Last TheoremJames-Hanson
junk-theorems-in-lean
Lean2025–2026
James-Hanson / junk-theorems-in-lean
junk-theorems-in-lean
A small collection of formally verified junk theorems provable in Lean4 + Mathlib.
3Distinct people
3Mentions
0Explicit recommenders
114GitHub stars
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What it is
A small collection of formally verified junk theorems provable in Lean4 + Mathlib.
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Where it is used
No documented product use has been verified yet.
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This week on Hacker News
Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 5:04:57 PM UTC.
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HN mentions by month3 dated mentions
Observed mentions: 2025-12-23 11:53:19 UTC to 2026-09-04 19:42:39 UTC.
Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.
View mention counts and date ranges
| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| Dec 2025 | 2025-12-01 00:00:00 UTC | 2026-01-01 00:00:00 UTC | 1 | 1 | 0 |
| Jan 2026 | 2026-01-01 00:00:00 UTC | 2026-02-01 00:00:00 UTC | 0 | 0 | 0 |
| Feb 2026 | 2026-02-01 00:00:00 UTC | 2026-03-01 00:00:00 UTC | 0 | 0 | 0 |
| Mar 2026 | 2026-03-01 00:00:00 UTC | 2026-04-01 00:00:00 UTC | 0 | 0 | 0 |
| Apr 2026 | 2026-04-01 00:00:00 UTC | 2026-05-01 00:00:00 UTC | 0 | 0 | 0 |
| May 2026 | 2026-05-01 00:00:00 UTC | 2026-06-01 00:00:00 UTC | 0 | 0 | 0 |
| Jun 2026 | 2026-06-01 00:00:00 UTC | 2026-07-01 00:00:00 UTC | 1 | 0 | 1 |
| Jul 2026 | 2026-07-01 00:00:00 UTC | 2026-08-01 00:00:00 UTC | 0 | 0 | 0 |
| Aug 2026 | 2026-08-01 00:00:00 UTC | 2026-09-01 00:00:00 UTC | 0 | 0 | 0 |
| Sep 2026 | 2026-09-01 00:00:00 UTC | 2026-10-01 00:00:00 UTC | 1 | 0 | 1 |
What Hacker News says
3 sourcesThat's not what I mean. I am talking about quirks and bugs that really are pretty subtle, and which really might turn up in e.g. a verified systems programming context: https://github.com/James-Hanson/junk-theorems-in-lean/blob/m... (there is a proof of 0=1 at the end - it is easy to understand where it comes from, but low-level compiler stuff like this is always a possibility.)
LLM agents will a) discover dumb counterintuitive stuff like this and b) exploit it to satisfy the kernel with c) the questionable lines being buried behind millions of lines of math slop. Humans have to check this stuff.
In AI in mathematics is forcing big questions