The minimum amount of a-amanitin that was identified with 100% agreement by testers was 2 mg. For the second part, there was 100% agreement that psilocin gives a positive Meixner test (100% false positive) and a 35% recognition rate of the 5-substituted tryptamine compounds as a positive Meixner test. There was no statistical difference between the interpretation of a-amanitin and psilocin, suggesting the test is unable to differentiate between them.