Contradictory Opposition, [109]; [111]–14; [119]; [121]; how affected by the existential import of propositions, [227]–32.

Contradictory Propositions, see [Contradictory Opposition].

Contradictory Terms, [61], 2; [470], 1.

Contraposition of Propositions, [134]–7; attempts to reduce contraposition to syllogistic form, [151]–3; illustrated by Euler’s diagrams, [161]; how affected by the existential import of propositions, [223]–7; of conditionals, [259], 60; of hypotheticals, [268]–70; is contraposition a process of inference, [422], 3; of complex propositions, [490]–3.

Contraposition per accidens, [136].

Contrapositive, see [Contraposition].

Contrary Opposition, [119]; [114], 5; [118]; how affected by the existential import of propositions, [227]–32.

Contrary Propositions, see [Contrary Opposition].

Contrary Terms, [62], 3.

Contraversion, [133] n. ; [134] n.