PROBLEM TO BE SOLVED: To provide a truth or falsehood decision article which facilitates truth or falsehood decision, is difficult to be falsified and requires no special area for giving n illegality prevention means. SOLUTION: This truth or falsehood decision article where two or more patterns for truth or falsehood decision are provided respectively at the positions of a rotational symmetry is subjected to truth or falsehood decision while being turned. The distance between adjacent patterns, a peripheral speed and the frequency of flickering irradiation satisfy 2πr=f1L1...(1) and L1/v1=f2T1...(2) (in expressions, r is turning radius, L1 is distance between adjacent patterns, v1 is peripheral speed of patterns, T is frequency of invisible light, and f1 and f2 are =1 integer).
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