The writer discusses deeply four outstanding errors in Hetuvidya research at present, considering that we should explain Trairupya and Hetuvidya theories from theoretical science, Trairupya belongs to logical axiom and no logical rule in nature, we shouldn't confuse the concept and proposition of Hetuvidya, and we ought to clearly distinguish intension from extension of Hetuvidya concept. In this way, we can understand accurately the Buddhist logic.
