Logic is the science that explains what conditions must be fulfilled in order that a proposition may be proved, if it admits of proof. When propositions are expressed with the universality and definiteness that belong to scientific statements, they are called laws; and laws, so far as they are not laws of quantity, are tested by the principles of Logic, if they at all admit of proof.
Logic: Deductive and Inductive
Publisher: Project Gutenberg
ISBN: ISBN/ASIN: B00264GNEA
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