An Elementary Treatise on Logic: Comprising the Essential Principles and Different Modes of Reasoning, in the Form of Question and Answer

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H.G. Ufford, 1823 - Logic - 192 pages
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Page 189 - Nothing, in truth, has such a tendency to weaken, not only the powers of invention, but the intellectual powers in general, as a habit of extensive and various reading, without reflection.
Page ii - In conformity to the act of Congress of the United States, entitled, " An act for the encouragement of learning, by securing the copies of maps, charts and books, to the authors and proprietors of such copies, during the times therein mentioned ;
Page 18 - In popular language, idea signifies the same thing as conception, apprehension, notion. To have an idea of any thing, is to conceive it. To have a distinct idea, is to conceive it distinctly. To have no idea of it, is not to conceive it at all. — When the word idea is taken in this popular sense, no man can possibly doubt whether he has ideas.
Page 138 - The conclusion also which results from them, though deduced by only probable inference, is commonly more to be relied upon than the veracity of an unsupported solitary witness. The danger of being deceived is less, the actual instances of deception are fewer, in the one case than the other. What is called positive proof in criminal matters, as where a man swears...
Page 174 - Suppose a knot, of a very artificial construction, to be put into my hands as an exercise for my ingenuity, and that I was required to investigate a rule, which others, as well as myself, might be able to follow in practice, for making knots of the same sort. If I were to proceed in this attempt, according to the spirit of a geometrical...
Page 96 - The predicate of the conclusion is called the major term because it is generally of a larger extension than the minor term, or the subject.
Page 40 - Conception is often confounded with other powers. When a painter makes a picture of a friend, who is absent or dead, he is commonly said to paint from memory : and the expression is sufficiently correct for common conversation. But in an analysis of the mind, there is ground for a distinction. The power of conception enables him to make the features of his friend an object of thought, so as to copy the resemblance ; the power of memory recognises these features as a former object of perception. Every...
Page 154 - Of this kind is the following : — ' If God did not create the world perfect in its kind, it must either proceed from want of inclination, or from want of power : — But it could not proceed either from want of inclination or want of power : — Therefore, he created the world perfect in its kind.
Page 144 - ... the middle term is the predicate of the major premise and the subject of the minor premise, •classification of moods ll:51a; tables •classification of valid forms 17:8921': table • logic history from antiquity 11:581...

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