An Introduction to Logic |
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accident affirmative alternatives angles animal argument Aristotle assert assertoric attributes belong called causal cause character colour common conceived conception conclusion concrete connexion connotative considered conversion copula deductive definition denied denote differentia disjunctive distinction distinguish distribution of terms division Edited effect enumeration equally example exhibit existence explain expressed extension F. H. Bradley facts fallacy false genus ground hypothesis hypothetical implies individual inductive inductive reasoning inference instances involved J. S. Mill judgement kind laws Logic major premiss major term matter means ment middle term minor term modus ponendo tollens moods nature necessary negative not-Y notion object occur particular phenomenon principles proposition prove question realize reasoning recognize reference relation rule sense Socrates species subject and predicate substance supposed syllogism syllogistic theory things thought tion triangle true truth universal universal proposition valid vertebrate vols words δὲ καὶ τὸ
Popular passages
Page 3 - But God has not been so sparing to men to make them barely two-legged creatures, and left it to Aristotle to make them rational...
Page 191 - An elementary school is a school, or department of a school, at which elementary education is the principal part of the education there given, and does not include any school or department of a school at which the ordinary payments, in respect of the instruction, from each scholar, exceed ninepence a week (Elementary Education Act, 1870, sec.
Page 372 - Why is a single instance, in some cases, sufficient for a complete induction ; while in others, myriads of concurring instances, without a single exception known or presumed, go such a very little way towards establishing a universal proposition ? Whoever can answer this question, knows more of the philosophy of logic than the wisest of the ancients, and has solved the problem of induction.
Page 399 - If two or more instances of the phenomenon under investigation have only one circumstance in common, the circumstance in which alone all the instances agree is the cause (or effect) of the given phenomenon.
Page 541 - That palter with us in a double sense ; That keep the word of promise to our ear, And break it to our hope.
Page 187 - ... this relation is possible in two different ways. Either the predicate B belongs to the subject A, as something which is (covertly) contained in this concept A; or B lies outside the concept A, although it does indeed stand in connection with it. In the one case I entitle the judgment analytic, in the other synthetic.
Page 432 - As the embryo often shows us more or less plainly the structure of the less modified and ancient progenitor of the group, we can see why ancient and extinct forms so often resemble in their adult state the embryos of existing species of the same class.
Page 479 - Every particle of matter in the universe attracts every other particle with a force that varies directly as the product of their masses, and inversely as the square of the distance between them.
Page 172 - With a sweet emotion ; Nothing in the world is single ; All things by a law divine In one another's being mingle— Why not I with thine...
Page 556 - Itaque recte respondit ille, qui, cum suspensa tabula in templo ei monstraretur eorum qui vota solverant quod naufragii periculo elapsi sint, atque interrogando premeretur, anne...