Five tarka schools
The five tarka schools or the five sophist schools (Skt. tārkika; Tib. ཏརྐ་སྡེ་ལྔ་ or སྟོག་གེ་སྡེ་ལྔ་, Wyl. tarka sde lnga or rtog ge sde lnga) — a grouping of non-Buddhist schools. It is said that all the non-Buddhist views can be condensed into these five schools.
According to Longchenpa they are: