01
How to play
Read one passage, choose Human or AI, then reveal its known source. Finish all eight passages to see your score.
Runs locally in your browser
TEXT ORIGIN CHALLENGE
Human or AI
Round 1 / 8
Score 0
Who wrote this passage?
ROUND COMPLETE
Keyboard: H Human · A AI · N Next
02
What your score means
- 0–2 Most labels fooled you; style alone is a weak signal.
- 3–5 You caught some cues and missed others.
- 6–7 You matched most known labels.
- 8 You matched every known label in this round.
03
How the set is built
Set design dated October 9, 2026: 20 short human comments published on Hacker News in 2015, plus 20 AI-written passages matched for topic, length, and informal forum voice. Each round draws four from each side, shuffles all eight, and never repeats an item within that round. Human provenance and year appear after each guess.
04
This page is not a detector.
It is a guessing game with known labels. It does not analyze visitor text, estimate authorship, or prove whether arbitrary writing came from a person or a model.