 As noted by H. Ui 1929 (reported in Katsura 1985 p. 166), the earliest mention of the three forms appears in a brief passage in a non-logical text, Shùn zhōng lùn (T1565 42a12,22ff). However, the author of this text, said to be Asaṅga, rejects the criterion, a criterion thought to be of a non-Buddhist origin.