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:

• Samkhya (Skt. Sāṃkhya; Tib. གྲངས་ཅན་པ་, Wyl. grangs can pa)
• Vaisheshika (Skt. Vaiśeṣika; Tib. བྱེ་བྲག་པ་, Wyl. bye brag pa)
• Mimamsaka (Skt. Mīmāṃsaka; Tib. དཔྱོད་པ་བ་, Wyl. dpyod pa ba)
• Jain (Skt. Jaina) or Nigrantha ('the naked ones') (Skt.; Tib. གཅེར་བུ་པ་, Wyl. gcer bu pa)
• Charvaka (Skt. Cārvāka; Tib. རྒྱང་འཕེན་པ་, Wyl. rgyang 'phen pa) or Brihaspati (Skt. Bṛhaspati; Tib. ཕུར་བུ་པ་, Wyl. phur bu pa)