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" B, or if C is D, E is F ; But either A is B, or C is D ; /. E is F. "
Formal Logic: Or, The Calculus of Inference, Necessary and Probable - Página 111
de Augustus De Morgan - 1847 - 336 páginas
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Pure Logic: Or, The Logic of Quality Apart from Quantity; with Remarks on ...

William Stanley Jevons - 1864 - 104 páginas
...or understood in its usual statement. The dilemma is as follows:— If A is B, E is F, and if C is D, E is F: but, either A is B, or C is D, therefore E is F. Adopting Wallis's reduction to the categorical form, and supplying some term G, to express the present...
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An outline of logic

Francis Garden - 1867 - 228 páginas
...combination of hypothetical and disjunctive elements. Its form is as follows : — If either A is B, or C is D, E is F. But either A is B, or C is D. . • . E is F. It is easy to see that we have here but an example of that which is generally, but,...
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The Laws of Discursive Thought: Being a Text-book of Formal Logic

James McCosh - 1870 - 252 páginas
...draw the common consequent in the conclusion. The argument is constructive : If A is B, or if C is D, E is F ; But either A is B, or C is D; .-.EisF. (3) In which each of the antecedents has a different consequent, and we can draw the consequent...
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The Laws of Discursive Thought: Being a Text-book of Formal Logic

James McCosh - 1873 - 244 páginas
...draw the common consequent in the conclusion. The argument is constructive : If A is B, or if C is D, E is F ; But either A is B, or C is D ; /. E is F. (3) In which each of the antecedents has a different consequent, and we can draw the consequent...
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A Dictionary of English Philosophical Terms

Francis Garden - 1878 - 280 páginas
...procedure. It consists in the combination of two hypotheses, with a complex disjunction. If A is B, or C is D, E is F ; but either A is B, or C is D, .•. E is F. The hypotheses or X^/tara, as we have seen, may be more than two, and the kind of reasoning...
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Outlines of Logic

Joseph Henry Gilmore - 1888 - 160 páginas
...a single consequent ; while its minor premiss is a disjunctive judgment. E. g. : If A is B, or C is D, E is F ; But either A is B or C is D ; . - . In any case, E is F. If this man is either a murderer or insane, he ought to be shut up ; But...
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Studies in Deductive Logic: A Manual for Students

William Stanley Jevons - 1880 - 370 páginas
...in (2) and (3), and then strike out two self-contradictory terms — A = AaB + AaC -I- AD = AD. 41. If A be B, E is F ; and if C be D, E is F ; but either A is B, or C is D ; therefore, E is F. (De Morgan, Formal Logic, p. 123. ) This appears to be more complicated in symbols than it really is....
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Pure Logic and Other Minor Works

William Stanley Jevons - 1890 - 346 páginas
...or understood in its usual statement. The dilemma is as follows : — If A is B, E is F, and if C is D, E is F : but, either A is B, or C is D, therefore E is F. Adopting Wallis's reduction to the categorical form, and supplying some term G, to express the present...
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Elementary Psychology: With Practical Applications to Education and Conduct ...

James Hutchens Baker - 1890 - 254 páginas
...DILEMMA. There are four forms of the Dilemma : First, the Simple Constructive — If A is B, or If C is D, E is F But either A is B, or C is D ; Example : If the judge decides the case in favor of A, or if he decides in favor of B, he will incur...
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Studies and Exercises in Formal Logic: Including a Generalisation of Logical ...

John Neville Keynes - 1894 - 514 páginas
...and contrapositing the major, we have — If E is not F, A is not B; and if E is not F, C it not D ; but Either A is B or C is D ; therefore, E is F; and this is a dilemma in the simple destructive form. The definition of the dilemma above given is...
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