Epithets, Question Begging, 343. Essential Attributes of Definition, 88. Etymological Definition, 85. Euler’s Diagrams, 141. Evolution and the Thinking Mind, 19. Examination Questions, 486. Exceptive Propositions, 135. Excluded Middle, Law of, 39. Exclusive Propositions, 136. Exercises, Testing Arguments, 481. Experiment as an Element in Induction, 419. Extension and Intension of Terms, Defined, 63; Compared, 63; Used in Comparison, 65; Other Forms of Expression for, 66; Law of Variation in, 66. F Fact, Defined, 96. Fallacies, of Deductive Reasoning, 322; Paralogism and Sophism, 322; Division of, 323; of Immediate Inference, 326; in Form, 194, 199; Hypothetical, 291; Disjunctive, 303; of Language, 328; in Thought, 334. False Cause, 340. False Consequent, Fallacy of, 339. Figure of Speech, Fallacy of, 333. Figures of Syllogism, 218; Special Canons of, 226; Perfect and Imperfect, 235; Reduction, 235; Relative Value of, 239. Formal Fallacies, 197, 324. Four Terms, Fallacy of, 329. Fowler Quoted, 4, 360. Fundamentum Divisionis, 108. G General Exercises in Testing Arguments, 481. General Terms, 49. Genus and Species, 78. Grammatical Subject and Predicate, 125. Grammatical Sentences, 131. H Hamilton Quoted, 4, 12, 131. Hibben Quoted, 4, 441. Huxley Quoted, 473. Hypothetical Arguments, 288; Kinds, 290; Rules and Fallacies, 291; Reduced to Categorical, 293; Illustrative Exercise in Testing, 297; General Exercises, 484. Hypothesis, Defined, 96, 425; and Theory, 427; Requirements of, 427; Uses of, 429. I Identity, Law of, 32; Absolute, 33; Complete and Incomplete, 33; Relative, 34. Illicit Major and Minor, 199; Illustration of, 215. Image, Definition of, 17. Immediate Inference, 159; by Obversion, 170; by Opposition, 161; by Conversion, 176; by Contraversion, 181; Epitome of Four Processes, 182; by Inversion, 183; Fallacies of, 326. Imperfect Induction, 361. Indefinite Propositions, 129. Individual Proposition, Nature of, 132; in Opposition, 168. Induction, Defined, 96; as a Method, 97; Reasoning, 355; and the Hazard, 356; the Three Forms of, 365; Perfect, 375; Special Function of, 438. Inference, Definition of, 18; a Thought Product, 24; Immediate, 159; Mediate, 192. Infima Species, 79. Instruction Defined, 95. Intension of Terms, 63. Integration, a Stage in Thought, 26. Inversion, 183. Inverted Proposition, 137. Irregular Arguments, 258. Irrelevant Conclusion, 337. J Jevons Quoted, 4, 25, 387, 468.