 Dignāga apparently enlarges the form of Vasubandhu’s canonical syllogism. Even though the texts just mentioned are not extant in Sanskrit, some of their commentaries are and some of these texts’ passages are found cited in existing Sanskrit works. Availing himself of these works, S. Katsura (2004a p. 143) has identified the following as an argument instantiating what Dignāga considers the canonical form of a good syllogism.