Construction, kind of Generation, [598].
Contradiction, Maxim or Axiom of, depends upon knowledge of quantity and quality of propositions, [137], [441]; not self-evident, [144]; among the præcognita of Demonstration, [212], [427]; not formally enunciated in any special science, [221]; discussion of, belongs to First Philosophy, [422], [425], why, [426], [579]; enunciated, as highest and firmest of all principles, [425], [585]; controverted by Aristotle’s predecessors, Herakleitus, Anaxagoras, &c., [427], [429], [441]; Aristotle’s indirect proof of, [427] seq., [585] seq.; applied in the Sokratic Elenchus, [441]; remarks on Aristotle’s defence of, [442]; can be supported only by an induction of particular instances, [443]; enunciated both as a logical and as an ontological formula, [579]; defended by Aristotle specially against Herakleitus, [579].
[Contradictory Opposites], pair of, make Antiphasis, [111]; distinguished from Contrary Opposites, [111], [124], [134]; rule of, as to truth and falsity, [112]; related pairs of, set forth in quaternions, [118] seq., [170]; distinction of from Contrary, fundamental in Logic, [137]; see [Antiphasis].
Contrariorum, Petitio, in Dialectic, [372].
Contrary Opposites (terms), [104]; Opposites (propositions), distinguished from Contradictory, [111], [124], [134]; rule of as to truth and falsity, [112].
Conversion (1) of Propositions, import of, [144]; rules for, with Aristotle’s defective proof thereof, [144] seq.; can be proved only by Induction, [146], [147]; (2) of Syllogism, [174].
Courage, definition of, [525].
D.
Debate, four species of, [377].