Grade the Claim
Every claim below is one this site has already graded and cited. Guess the grade, then read why. Getting it one rung out still earns credit — the skill is calibration, not certainty.
6 claims. How good is your radar?
Anything you have got wrong before is dealt in first. Nothing is timed, and the reveal shows you the source either way.
How the scoring works
Two points for the exact grade, one for being a single rung out, none beyond that. Calling early evidence “strong” is a near miss; calling a contradicted claim strongly supported is the mistake the whole game exists to correct, so it scores nothing.
Claims you get exactly right move up a review ladder and come back in 1, 2, 4, 8 then 16 days. Claims you get wrong come back tomorrow, and are dealt into your next round first. Progress lives on this device unless you sign in.
The bank is drawn from 391 graded claims across the health sections, the supplement database and the debunk hub — the same verdicts, with the same sources, as the pages themselves. If you disagree with a grade, the reveal links to the page and its citation so you can take it up with the evidence.