An Introductory Logic

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Macmillan, 1909 - Logic - 520 pages
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Page 448 - No reason can be given why the general happiness is desirable, except that each person, so far as he believes it to be attainable, desires his own happiness. This, however, being a fact, we have not only all the proof which the case admits of, but all which it is possible to require, that happiness is good: that each person's happiness is a good to that person, and the general happiness, therefore, a good to the aggregate of all persons.
Page 72 - For he that shall well consider the errors and obscurity, the mistakes and confusion, that are spread in the world by an ill use of words, will find some reason to doubt whether language, as it has been employed, has contributed more to the improvement or hindrance of knowledge amongst mankind.
Page 264 - 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 68 - A non-connotative term is one which signifies a subject only, or an attribute only. A connotative term is one which denotes a subject, and implies an attribute.
Page 246 - 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 468 - Nothing is demonstrable, unless the contrary implies a contradiction. Nothing, that is distinctly conceivable, implies a contradiction. Whatever we conceive as existent, we can also conceive as non-existent. There is no being, therefore, whose non-existence implies a contradiction.
Page 450 - A man that hath no virtue in himself ever envieth virtue in others. For men's minds will either feed upon their own good or upon others...
Page 289 - We spent many hours in Cwm Idwal, examining all the rocks with extreme care, as Sedgwick was anxious to find fossils in them; but neither of us saw a trace of the wonderful glacial phenomena all around us; we did not notice the plainly scored rocks, the perched boulders, the lateral and terminal moraines. Yet these phenomena are so conspicuous that, as I declared...
Page 176 - It is the man of God, who was disobedient unto the word of the LORD : therefore the LORD hath delivered him unto the lion, which hath torn him, and slain him, according to the word of the LORD, which he spake unto him. 27 And he spake to his sons, saying, Saddle me the ass. And they saddled him.
Page 124 - No term must be distributed in the conclusion which was not distributed in one of the premises...

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