Convertend, [127].
Convertible Copula, [388].
Copula, [93].
Correlative Name, [63].
Criterion of Consistency, Jevons’s, [217] n. ; [219]; [232], 3.
Deductio ad impossibile, or ad absurdum, [319].
Definition by type, [34].
De Morgan, A., use of the terms contrary and contradictory, [62] n. ; [101] n. ; [104]; [104] n. ; on conversion, [126] n. ; [133] n. ; on contraposition, [136]; [153] n. ; on the proposition ω, [206], 7; [210] n. ; [217] n. ; on the existential import of propositions, [219], [232]; on the syllogistic rules, [290], [292]; [314]; on the mnemonic verses, [319]; on the numerically definite syllogism, [377]; on the argument à fortiori, [385], 6; on the logic of relatives, [387], 8; on immediate inferences and the laws of thought, [466]; [495].
Denial, Nature of, [119]–24.
Denotation, [29]–31; [31]–3; law of variation with connotation, [37]; relation to comprehension, [38], 9.