Analysis of information sources in references of the Wikipedia article "Logic" in English language version.
... for Nyāya all inference is ultimately rooted in perception ... Naiyāyikas typically accept four means of knowledge: perception, inference, comparison, and testimony.
... for Nyāya all inference is ultimately rooted in perception ... Naiyāyikas typically accept four means of knowledge: perception, inference, comparison, and testimony.
The two most important types of logical calculi are propositional (or sentential) calculi and functional (or predicate) calculi. A propositional calculus is a system containing propositional variables and connectives (some also contain propositional constants) but not individual or functional variables or constants. In the extended propositional calculus, quantifiers whose operator variables are propositional variables are added.