Inversion of Propositions, [137]–9; validity of the process, [139], [40]; illustrated by Euler’s diagrams, [161]; how affected by the existential import of propositions, [223]–7; of hypotheticals, [269].

Invertend, [139].

Jevons, W. S., [12] n. ; [19] n. ; [20] n. ; his use of the term connotation, [26]; [37] n. ; regards proper names as connotative, [41]–3; on relative names, [63], 4; on contradictory opposition, [111]–14; on conversion, [130]; [133] n. ; on contraposition, [136] n. ; [139]; [152] n. ; his use of Euler’s diagrams, [159]; on types of logical equations, [191], 2; on the interpretation of some, [202]; [205] n. ; [210] n. ; on questions about existence in logic, [217] n. ; his criterion of consistency, [217] n., [219], [232], 3; [220] n. ; on the import of disjunctives, [279]; on the order of premisses in a syllogism, [287]; on negative premisses, [295]; on the ordinary syllogistic conclusion, [300]; [349]; [365]; [366]; [416]; on division by dichotomy, [445], 6; [449]; his principle of the substitution of similars, [453], 4; on the law of duality, [460]; [470] n. ; [472] n. ; [473]; [475]; [495]; on Boole’s System of Logic, [506] n. ; [507] n. ; on the inverse problem, [525], 6, [529], [30].

Johnson, W. E., [31] n. ; on the import of propositions, [70] n. ; on the formulation of propositions, [72]; on multiple quantification, [106] n. ; [132] n. ; [144] n. ; on the proposition ω, [206] n. ; on the distinction between conditional and hypothetical propositions, [249] n. ; [265] n. ; [293] n. ; on the special rules of the syllogistic figures, [311] n. ; on dicta for the third and fourth figures, [338]; [388]; [469] n. ; on the analysis of ordinary categorical propositions, [479], 80; on the synthesis of propositions, [481] n. ; his notation for the solution of inverse problems, [533], 4.

Jones, Miss E. E. C., [126] n. ; [134] n. ; [148] n. ; [151]; [190] n. ; on the existential import of propositions, [244] n. ; on conditional propositions, [256] n. ; [260]; on hypothetical propositions, [264] n. ; on the use of the term alternative, [275]; on the nature of inference, [416] n. ; [418] n. ; on division and classification, [447].

Judgment, the logical unit, [8], 9.

Judgments, as related to propositions, [66]–8; their essential characteristics, [70]; their objective reference, [74]–6; their universality, [76], 7; their reference to time, [76], 7; their necessity, [77], 8; their classification, [79]–81; their division according to relation, [82]; into simple and compound, [82]–4; their modality, [84]–91; their quantity and quality, [91], 2. See also [Propositions].

Judgments of actuality, [88].

Judgments of necessity, [88].

Judgments of possibility, [88].