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Playable demos & bots

The Confidence Game

Play trivia by assigning probabilities, then compare your calibration with Jev and a coin flip.

Source screenshot of The Confidence Game
SOURCE SCREENSHOT · source ↗ · captured 2026-09-22Full screenshot ↗

What it does

The browser includes a fixed bank of 937 claims, so no key is needed. Jev's reported full-bank Brier score is 0.067.

Maker-reported (not independently measured by JevMade): 937-claim bank; Jev Brier 0.067, accuracy 91%, ECE 0.046 against a coin flip's 0.250 (author-reported, printed by npm run eval) · About $0.011 to ask Jev every claim in the bank (author-reported)

Primitives
noul
Platform
TypeScript
Added
Project created
GitHub stars
0 · snapshot 2026-09-22

Source checked 2026-09-22 — opened the primary source directly.