Page images
PDF
EPUB

INDEX

Abstract and concrete terms, 37
Accent, fallacy of, 203
Accident and genus distinguished, 49
Accident and secundum quid, relation between, 210
Accident, fallacy of, 207, 208
Adjectives regarded as substantives, 36
Amphiboly, 201
Analysis and synthesis, logical and physical, distinguished, 108
Analysis, use of, 116
Analytical processes, 42
Apodictic, 23, 70
Apprehension, 41
A priori, and empirical notions, 71
Arguing in circle, 160
Aristotle, his dictum, 76 ; his classification of fallacies, 197

Bain, an opinion of, 83
Burden of proof, 164

Canons of the several figures of syllogism, 100
Categories and predicables distinguished, 66
Classification, division and, 44
Collective and distributive interpretation, 60
Commonplace and original thought distinguished, 112
Commonplaces, 156

The numbers refer to sections.

Common terms, singular and, 35
Composition and division, fallacy of, 202
Concept defined, 30
Concrete terms, abstract and, 37
Confusion, fallacy of, 139
Connotation and denotation of terms, 32
Consequent, fallacy of the, 212
Consequentis, F., 212
Contradiction, the law of, 125
Contradictory, substitution of, 80
Contraposition, conversion by, so
Conversion by intension, 58
Conversion of propositions, 54, 70, 91
Conversions, material and formal, distinguished, 92
Copula, the, 55
Criticism, 115

Definition, vocal, 43; nominal or real, 48
Denotation and connotation of terms, 32
Dialectic, 23, 70
Dichotomy, 47
Dictum, Aristotle's, 76; forms of, 99; applicable to all fig-
Fallacies, classification of, 129; definition of, 128 ; observa-

ures, 100, 101; and to singular and other equational

propositions, 102; proposed amendments of, 103
Division, 46
Division and classification, 44

Enthymemes, 105
Equational theory of predication, 56
Equivalence of terms, 78
Equivocation, fallacy of, 127, 191, 201
Essence of term, 49
Euclid, his fifth proposition reduced to syllogisms, 84
Excluded middle, the law of, 125
Extension and intension of terms, 34

The numbers refer to sections.

tions on, 132 ; extra dictionem, 206; in dictione (equivo-
cation), 201 ; of inference, 131; of judgment, 130; of

the syllogism, 104, 124
False definition, fallacy of, 126, 144
Figuræ dictionis, F., 204
Figure of speech, fallacy of, 204
Figures of the syllogism, 95
Formal and material conversions, 92
Formal and material relations of terms, 67
Formal fallacies, 104

Genus and accident, 49
Genus and species, 45
Genus of term, 49

Homonymy, 201
Hypothesis, argument from, 165 n
Hysteron proteron, 160

Identity, the law of, 125
Ignoratio elenchi, fallacy of, 126, 169
Illicit assumption of premises (petitio principii), 154; tests

of, 162
Illicit conversions, 127, 183
Illicit generalization, 155
Illicit substitution, fallacy of, 127, 187
Immediate inferences, 80
Inference, rules of, 77, 123, 127
Inferences, immediate, 80
Infinitation, 80
Instance, or extreme case, 163
Intension and extension of terms, 34
Intensive conversion, 58
Intensive theory of predication, 58
Intuitive propositions or judgments, 18, 19

The numbers refer to sections.

Invention, 113
Irrelevant conclusion, fallacy of, 126, 169, 173

Judgment, defined, 19; rules of, 126
Judgments and assumptions distinguished, 68

Knowledge defined, 1, 2, 5

Language, as record of human thought, 4; as source of

opinion, 3
Laws of thought, the, 125: the law of identity, 125; the

law of contradiction, 125; the law of excluded middle,

125
Legal maxims, 158
Logic, definition of, 14, 16; the traditional, 85; decadence

of the age in, 11; method of, u; the morality of in-
tellect, 27; the art of right reasoning, 26; the ultimate

criterion of truth, 10; as the doctrine of signs, 110
Logical processes, 107, 112
Logical term, elements of the, 31

Material and formal conversions, 92
Material and formal relations of terms, 67
Mathematical reasoning, 82
Meaning and signification of terms, 33
Method of logic, III
Mistaking the issue, 169, 170
Moods of the syllogism, 94
Moral sciences, distinguished, 6; decadence of the age in the,

II

Name defined, 28
Negative terms, positive and, 39
Nominal or real definition, 48
Non causa pro causa, fallacy of, 159
Nonsense, fallacy of, 126, 134, 138
Notion defined, 30

The numbers refer to sections,

Onus probandi, 164
Opinion, its modes of generation, 7; language as source of, 3
Opposition of propositions, 89
Original and commonplace thought distinguished, 112

Petitio principii, fallacy of, 126
Plurium interrogationum, F., 171
Popular proverbs, 157
Positive and negative terms, 39
Post hoc ergo propter hoc, 159
Predicables, definition and division of, 61; and categories dis-

tinguished, 66
Predication, theories of, 55, 60
Property and specific difference distinguished, 49
Proposition, defined, 22, 50; the grammatical, 51; the logi-

cal, 52; interpretation of the logical, 53; the traditional

doctrine of the, 86
Propositions, conversions of, 54, 91 ; kinds of: intuitive, 18,

20; quasi-intuitive, 20; inferred, 21
Proverbs, popular, 157

Quality of propositions, 86
Quantification of the predicate, 57
Quantity of propositions, 87
Quasi-thing defined, 29
Question-begging terms, 161

Ratiocination, defined, 14, 15; not merely hypothetical, 72
Real things defined, 29
Reasoning, defined, 14 ; supposed distinction between quali-

tative and quantitative, 82
Reductio, ad absurdum, 165 ; ad impossibile, 165 n
Reduction of syllogisms, 96
Relations of terms, immediate; intuitive relations or judg-

ments, 18, 19; quasi-intuitive, or assumptions, 20; in-
ferred relations or syllogisms, 21

The numbers refer to sections.

« PreviousContinue »