Premisses of Syllogism, [148]; how to disengage for Reduction, [164]; involving qualification, [166]; false, yielding true conclusion, [172]; contradictory, yielding a conclusion in Second and Third figures, [175]; necessary character of, in Demonstration, [215]; in Dialectic, [227].
Principles of Science, furnished only by Experience, [162], [257]; knowable in themselves, but not therefore innate, [178], [256]; what, common to all, [212], [215]; maintained by Aristotle to be indemonstrable, [215], [228]; general and special, [236], [578]; development of, [256]; known by Noûs upon Induction from particulars, [259], [562], [577]; discussed by First Philosopher, and by Dialectician, [575].
Principii Petitio, Fallacy of, [156], [176]; in Dialectic, [367], [371]; in Sophistic, [388]; how to solve, [412].
Prius, different senses of, in Post-præedicamenta, [105]; in Metaphysica Δ, [106]; Aristotle often confounds the meanings of, [106]; as between parts and whole, [601]-603.
Privatio and Habitus, case of Opposita, [104], [105].
Προαίρεσις, definition of, [526].
Probabilities, Syllogism from, [202].
Probable, The, true meaning of, in Aristotle, [269].
Problematical proposition, The, a truly formal mode, [131].
Problems, for scientific investigation, [238]; identical, [253]; in Dialectic, [273].