(Sanskrit प्रमाण) "Right knowledge, right perception, proof, authority, correct notion, measure, unity."
"Pramana [right knowledge] is direct perception, or inference, or testimony." - Patanjali, Yoga Sutra 1:7
"The following are the Pramanas (proofs of knowledge) of Vedanta:
1. Pratyaksha Pramana (direct proof)
2. Anumana (inference)
3. Sabda Pramana (testimony of the Vedas and realised persons)
4. Upamana (simile)
5. Arthapatti (presumption), and
6. Anupalabdhi (knowledge of non-existence)" - Swami Sivananda, Self-Knowledge
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