An Introduction to General Logic

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Longmans, Green, 1892 - Logic - 283 pages
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Page 238 - If all the year were playing holidays, To sport would be as tedious as to work ; But when they seldom come, they wish'd for come, And nothing pleaseth but rare accidents.
Page 229 - Whatever phenomenon varies in any manner whenever another phenomenon varies in some particular manner, is either a cause or an effect of that phenomenon, or is connected with it through some fact of causation.
Page 229 - Subduct from any phenomenon such part as is known by previous inductions to be the effect of certain antecedents, and the residue of the phenomenon is the effect of the remaining antecedents.
Page 258 - Upon the same base, and on the same side of it, there cannot be two triangles, that have their sides which are terminated in one extremity of the base equal to one another, and likewise those which are terminated in the other extremity, equal to one another.
Page 228 - 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 228 - If two or more instances in which the phenomenon occurs have only one circumstance in common, while two or more instances in which it does not occur have nothing in common save the absence of that circumstance ; the circumstance in which alone the two sets of instances differ, is the effect, or cause, or an indispensable part of the cause, of the phenomenon.
Page 228 - If an instance in which the phenomenon under investigation occurs, and an instance in which it does not occur, have every circumstance in common save one, that one occurring only in the former: the circumstance in which alone the two instances differ is the effect, or cause, or an indispensable part of the cause, of the phenomenon.
Page 73 - All the angles of a triangle are less than two right angles" it is used distributively, the predicate applying to each and every angle of a triangle taken separately. In the proposition " All the angles of a triangle are equal to two right angles " it is used collectively, the predicate applying to all the angles taken together, and not to each separately.
Page 287 - The difference between one event and another does not depend on the mere difference of the times or the places at which they occur, but only on differences in the nature, configuration, or motion of the bodies concerned.
Page 264 - ... really exemplary. I felt it so, the first time I saw the miracle, as it appeared to me ; but I thought so much more, a year or two after, when a lady, to whom he had sacrificed some very precious time, on the supposition that she understood as much as she assumed to do, finished by saying, 'Now, Mr. Babbage, there is only one thing more that I want to know. If you put the question in wrong, will the answer come out right?

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