Upamāṇa in the context of "Mīmāṃsā"

Mīmāṁsā (Sanskrit: मीमांसा; IAST: Mīmāṁsā) is a Sanskrit word that means "reflection" or "critical investigation" and thus refers to a tradition of contemplation which reflected on the meanings of certain Vedic texts. This tradition is also known as Pūrva-Mīmāṁsā because of its focus on the earlier (pūrva) Vedic texts dealing with ritual actions, and similarly as Karma-Mīmāṁsā due to its focus on ritual action (karma). It is one of six Vedic "affirming" (āstika) schools of Hindu philosophy. This particular school is known for its philosophical theories on the nature of Dharma, based on hermeneutics of the Vedas, especially the Brāḥmanas and samhitas. The Mīmāṃsā school was foundational and influential for the Vedāntic schools, which were also known as Uttara-Mīmāṁsā for their focus on the "later" (uttara) portions of the Vedas, the Upanishads. While both "earlier" and "later" Mīmāṁsā investigate the aim of human action, they do so with different attitudes towards the necessity of ritual praxis.

Mīmāṁsā has several sub-schools, each defined by its pramana. The Prabhākara sub-school, which takes its name from the seventh-century philosopher Prabhākara, described the five epistemically reliable means to gaining knowledge: pratyakṣa or perception; anumāna or inference; upamāṇa, comparison and analogy; arthāpatti, the use of postulation and derivation from circumstances; and shabda, the word or testimony of past or present reliable experts. The Bhāṭṭa sub-school, from philosopher Kumārila Bhaṭṭa, added a sixth means to its canon; anupalabdhi meant non-perception, or proof by the absence of cognition (e.g., the lack of gunpowder on a suspect's hand)