section_path: Philosophy and practice/Pramanas - means of knowledge
section_name: Pramanas - means of knowledge
paragraph_text: Pramanas - means of knowledge
  
  Shankara recognized the means of knowledge, but his thematic focus was upon metaphysics and soteriology, and he took for granted the pramanas, that is epistemology or "means to gain knowledge, reasoning methods that empower one to gain reliable knowledge". According to Sengaku Mayeda, "in no place in his works does he give any systematic account of them," taking Atman-Brahman to be self-evident (svapramanaka) and self-established (svatahsiddha), and "an investigation of the means of knowledge is of no use for the attainment of final release." Mayeda notes that Shankara's arguments are "strikingly realistic and not idealistic," arguing that jnana is based on existing things (vastutantra), and "not upon Vedic injunction (codanatantra) nor upon man (purusatantra).
  
  According to Michael Comans (aka Vasudevacharya), Shankara considered perception and inference as a primary most reliable epistemic means, and where these means to knowledge help one gain "what is beneficial and to avoid what is harmful", there is no need for or wisdom in referring to the scriptures. In certain matters related to metaphysics and ethics, says Shankara, the testimony and wisdom in scriptures such as the Vedas and the Upanishads become important.
  
  Merrell-Wolff states that Shankara accepts Vedas and Upanishads as a source of knowledge as he develops his philosophical theses, yet he never rests his case on the ancient texts, rather proves each thesis, point by point using the pramanas (means of knowledge) of reason and experience. Hacker and Phillips note that his insight into rules of reasoning and hierarchical emphasis on epistemic steps is "doubtlessly the suggestion" of Shankara in Brahma-sutra-bhasya, an insight that flowers in the works of his companion and disciple Padmapada.