THE SCIENCE OF LOGIC 



Transcendental notions, i., 149. 



Transversion, i.. 269. 



Tree of Porphyry, i., 78-9. 



Tres modi sciendi, i., 90 ; ii., 2. 



Truth, and judgment, i., 158-62; ob 

 jective character of, i., 160-2, 179-80 ; 

 ii., 220-3 ; in hypothetical judgments, 

 i., 263-4; ii., 217-23; in alternative 

 judgments, i., 290, 371 ; definition and 

 kinds of truth, ii., 210, 213, 235 ; truth 

 indivisible, 214, 260-1 ; attainable, 

 325-7 ; necessity of, v. necessity. 



&quot; Tu quoque&quot; ii., 316. 



TYNDALL, ii., 140. 



Type, definition by, i., 97-9. 



Types, organic and inorganic, i., 129. 



Ubi, category of, 142. 



UEBERWEG, on nominal definition, i., 100- 

 i ; on dilemma, 375 ; on regressive 

 reasoning, ii., 9 ; on induction, 34 ; on 

 application of syllogism, 117, 227. 



Ultimate sources of inferred conclusions, 

 i., 410-12, 414. 



Unconditional principles in science and 

 philosophy, ii., 107-13. 



Undistributed middle, i., 308. 



Undue assumption of axioms (cf. assump 

 tion), ii., 255, 317, 322-7, 334. 



rejection of axioms, ii., 323. 

 Uniformity of nature, principle of, as 



categorical, ii., 96-9, 109; as hypo 

 thetical, 94-6, 109. 



grounds of belief in, 99-113, 116, 

 320-22. 



recognized by Scholastics, ii., 35-7, 

 67, 93- 



relation to deduction and syllogism, 

 ii., 116-19; to induction, 114-16. 



and causality, ii., 71-2. 



and possibility of science, ii., 73-4, 

 93-4- 



sphere of application of, ii., 94. 

 Unitary terms, i., 46. 



Units of measurement, ii., 202. 

 Unity of nature, ii., 105-6. 

 Universal concepts, formation of, i., 4-8, 

 63; direct and reflex, 138. 



grammar, i., 34. 



judgment in reasoning, immediate, i., 

 231-2, 236 ; syllogistic, 313-5 ; mediate, 

 392-5 ; errors on its function, 395 sqq., 

 403 ; apprehension and application of, 

 407-12 ; ii., 216-17, 262-3. 



judgments and propositions, categori 

 cal, i., 188-98. 



Universality, grades of, in judgment, i., 

 188-92, 201-2 ; 404-6 ; ii., 23, 215-17. 



Universals, controversies on significance 

 of, i., 8-n ; ii., 107-8, 221-3. 



Universe, ultimate views of, v. Hegel, 

 mechanical, scholastic, theism, 



of discourse, i., 54, 65, 161, 249-52, 255. 



Univocal terms, i., 43-4; predication 

 149. 



Validity of inference, formal and material 

 i., 294-7, 3 I 4~ I 7 40* n dilemmas, 

 370-3. 



of thought, i., 19-23. 

 VEITCH, i., 39, 174 ; ii., 242. 



VENN, Dr. J., on denotation, i., 55 ; on 

 definition, 90, 102 ; on classification 

 125, 129, 130 ; on existential import, 

 259; on &quot;if&quot; judgments, 267 - 70 ; on 

 alternative judgments, 281 ; on dis 

 covery by inference, 400, 408 ; on in 

 duction and inference, 411-12 ; on 

 enumerative treatment of induction, ii., 

 43; on inverse processes, 55, 248; on 

 causes, 62 ; on plurality of causes, 87- 

 9 ; on uniformity of nature, 93, 100, 

 105, 117-19; on experimental analysis, 

 169 ; on symbolic notation of experi 

 mental methods, 200 ; on chance, 269, 

 271, 273, 283-4. 



Vera causa, ii., 128. 



Verbal disputes, ;., 103-5. 



division, i., 114. 



propositions, i., 170-80. 



transformations, and inference, i., 166, 

 212, 231, 239, 396. 



Verification, v. hypothesis. 



Vicious circle, i., 401 ; ii. , 113, 235,320. 



&quot; Vires occultae&quot; v. occult. 



Vis cogitativa, i., 394. 



VREOILLE, Pere de, ii., 132. 



WALKER, L. J., ii., 147. 



WARD, ii., 130, 131, 133, 134, 135. 



WATT, ii., 122. 



Weakened conclusions, i., 325. 



Weaker premiss, i., 317-8 ; ii., 264-5. 



WEISMANN, ii., 129, 131, 139, 140. 



WELTON, Prof. J., on principle of suffi 

 cient reason, and reality, i., 27 ; ii., 59- 

 60 ; onproprium, i., 83 ; on definition, i., 

 go, 93, 98-9, 102, no; on division, i., 

 117, 127-8; on categories, 137-8, 144; 

 on subject and predicate, 156-7 ; on 

 grounds of negation, 205-6 ; on quantifi 

 cation of predicate, 213-16 ; on material 

 inferences, 247 ; on conditional judg 

 ments, 271 ; on disjunctive judgments, 

 286, 288-9 ! on direct determination of 

 valid moods of syllogism, 329-31 ; on 

 second figure, 345 ; on pure hypotheti 

 cal syllogisms, 357-8 ; on pure disjunc 

 tive syllogisms, 362 ; on dilemmas, 375 ; 

 on non-syllogistic mediate inferences, 

 391 ; on regressive reasoning, ii., 8-9 ; 

 on method of teaching, 15, 16 ; on in 

 ductive syllogism, 29 ; on scholastic 

 view of induction, 33 ; on induction as 

 an inverse process, 55 ; on mechanical 

 view of reality, 69, 133, 141 ; on efficient 



