Your Kindle Notes For:
Deductive Logic
St. George William Joseph Stock
Last accessed on Friday November 5, 2010
7 Highlight(s) | 1 Note(s)
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deductive logic, which may be defined as The Science of the Formal Laws of Thought.
Note:Defin
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Thought, as here used, is confined to the faculty of comparison. All thought involves comparison, that is to say, a recognition of likeness or unlikeness.
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formal logic is concerned with the essential and necessary elements of thought as opposed to such as are accidental and contingent. By
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Science is systematized knowledge; Art is systematized action. Science is acquired by study; Art is acquired by practice.
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Science is either speculative or practical.
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(1) The Law of Identity-- Whatever is, is; or, in a more precise form, Every A is A. (2) The Law of Contradiction-- Nothing can both be and not be; Nothing can be A and not A. (3) The Law of Excluded Middle-- Everything must either be or not be; Everything is either A or not A.
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§32. There are three processes of thought (1) Conception. (2) Judgement. (3) Inference or Reasoning.
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