Explanation : Inference occupies a central place in the
Hindu school of logic (Nyaya). This school
worked out a syllogism in the form of an
argument that goes through five stages:
(1) the proposition (pratijna, literally
"promise"),
(2) the ground (hetu),
(3) the illustration (udaharana),
(4) the application
(upanaya), and
(5) the conclusion
(nigamana).
A syllogism is vitiated by a
fallacious ground or hetvabhasa ("the mere
appearance of a ground").
Upamana (analogy) is one of the six main
sources of knowledge in astiks system of
Indian philosophy.