Studies and Exercises in Formal Logic: Including a Generalisation of Logical Processes in Their Application to Complex InferencesMacmillan and Company, 1884 - 414 páginas |
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Términos y frases comunes
ABCdE or abcde absent abstract names alternatives antecedent apply argument assertion attribute Barbara Baroco bcde Camestres categorical propositions categorical syllogism Celarent combination complex propositions conclusion connotation contained contradictory contrapositive conversion Darii Deductive Logic denoted deny diagrams Dictum de omni disjunctive proposition disjunctive syllogism distinction distributed enthymeme equivalent Everything example false Formal Logic gisms given proposition gives Hamilton hypothetical proposition hypothetical syllogism illicit major immediate inference implies the existence Inverse involved Laws of Thought logicians major premiss major term Mansel means middle term minor term modus tollens moods of Figure Morgan negative premisses not-B not-S is not-P obtained obversion omni et nullo original proposition particular polysyllogism position predicate Professor Jevons prove question reasoning reduced shew shewn Similarly singular sitions special rules statement Studies in Deductive subaltern syllogistic Symbolic Logic thing tion true universal proposition Venn
Pasajes populares
Página 269 - My cousin Westmoreland ! No, my fair cousin : If we are mark'd to die, we are enow To do our country loss ; and if to live, The fewer men, the greater share of honour.
Página 1 - is a word taken at pleasure to serve for a mark which may raise in our mind a thought like to some thought we had before, and which being pronounced to others, may be to them a sign of what thought the speaker had •(• before in his mind.
Página 241 - If A is B, C is D ; and if E is F, G is H ; But either C is not D, or G is not H ; Therefore either A is not B, or E is not F.
Página 352 - That wherever the properties A and B are both absent, the properties C and D are both absent also; and vice versa, where the properties C and D are both absent, A and B are both absent also. Let it then be required from the above to determine what may be concluded in any particular instance from the presence of the property A with respect to the presence or absence of the properties B and (7, paying no regard to the property D.
Página 266 - For those who are bent on cultivating their minds by diligent study, the incitement of academical honours is unnecessary; and it is ineffectual, for the idle, and such as are indifferent to mental improvement: therefore the incitement of academical honours is either unnecessary or ineffectual.
Página 250 - What worst relation of subject and predicate, subsists between either of two terms and a common third term, with which one, at least, is positively related ; — that relation subsists between the two terms themselves...
Página 265 - Testimony is a kind of evidence which is very likely to be false : the evidence on which most men believe that there are pyramids in Egypt is testimony : therefore the evidence on which most men believe that there are pyramids in Egypt is very likely to ba false.
Página iii - Fcap. 8vo. 31. 6d. THE PRINCIPLES OF SCIENCE. A Treatise on Logic and Scientific Method. New and Revised Edition. Crown 8vo. 12s. 6d. STUDIES IN DEDUCTIVE LOGIC. Second Edition. Crown 8vo. 6s. Keynes. — FORMAL LOGIC, Studies and Exercises in. Including a Generalisation of Logical Processes in their application to Complex Inferences. By JOHN NEVILLE KEYNES, MA, late Fellow of Pembroke College, Cambridge.