The book Logic was written by author Bain, Alexander, 1818-1903 Here you can read free online of Logic book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Logic a good or bad book?
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To the first question, he replies, that it is always theoreti- cally possible so to resolve and to combine propositions that elimination may subsequently be effected by the syllogistic canons, but that the process of reduction would, in many cases, be constrained and unnatural, and would involve operations that are not syllogistic. To the second question, he replies that reasoning cannot, ex- cept by arbitrary restriction, be confined to elimination. It cannot be less than the aggregate of the ...methods founded on the Laws of Thought, and the process of elimination, import- ant as it is, is only one process among others. He farther remarks that, of all the Laws of Thought, the one of fundamental importance in Logic, is the Law of Con- tradiction, to which Leibnitz also assigned the same position. All persons that have attained a just notion of the Rela- tivity of Knowledge, would agree with Boole in the prime im- portance thus given to Contrariety or Contradiction ; but this merely goes the length of Equivalence or Immediate Inference.
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