Seven Treatises on Valid Cognition

Written by Dharmakīrti as a detail commentary on the works of Dignāga, they became the fundamental works (mūla) to be studied on logic.

The principle text, containing the 'body' of the system is the

• Pramāṇa-vārtika - consisting of four chapters on

1. Inference
2. Valid cognition
3. Sense perception
4. Logic

The remaining treatises, considered the 'six feet' of this text, are:

• The two abridgments of the Pramāṇa-vārtika called:

1. Pramāṇa-vinišcaya
2. Nyāya-bindu

These both contain three chapters dealing with: sense perception, inference, and logic.

Then:

• Hetubindu - a short classification of logical reasons
• Sambandha-parīkṣā - an examination of the problem of relations
• Codanā-prakaraṇa - a treatise on debate
• Santānāntara-siddhi - a treatise on the reality of other minds, directed against the position of Solopsism (the theory that only the self exists).

All these works, aside from the Nyāya-bindu, are lost in the original Sanskrit but remain as translated works then the Tibetan Tengyur (bstan 'gyur).

Source: Buddhist Logic Volume 1 - TH. Stcherbatsky: p37