A daily game for Hacker News readers.
Below are three real HN threads, but some comments were written by AI.
Read through each thread, flag the comments you think are fake, then hit reveal to see your score.
1.Why is the x86 undefined instruction called ud2? Why 2? (devblogs.microsoft.com)
266 points by ibobev 18 days ago | 71 comments
2.Dropping eBPF CPU Cost by About 90% with Memoization (Not AI Gen) (nathannaveen.dev)
155 points by nathannaveen 17 days ago | 33 comments
3.I stopped drinking the AI Kool-Aid (joshtronic.com)
67 points by joshtronic 11 days ago | 51 comments
2026-09-21