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THE SUBJECT MATTER OF LOGIC
Partial Evidence or Probable Inference
The Use and Application of Logic
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affirmative alternative analysis angles antilogism Archimedes argument Aristotle arithmetic mean assert assumptions axioms believed body called canon categorical categorical propositions categorical syllogism cause conclusion connected consequences contradictory contrapositive deductive definiendum definiens definition denoted determine discover disjunctive disjunctive proposition distinct elements employed equivalent evidence examine example expressed fact factors fallacy false falsity formal frequently geometry gism Hence Herodotus human hypothesis hypothetical syllogisms imply induction inference inquiry instances invariable knowledge l-class laws logical principles major premise mathematicians mathematics meaning measure method of agreement moral nature negative non-Euclidean geometry objects observed plane possible postulate predicate probability proof properties propo prove question reader reason regarded relation rules scientific method sense sitions social subject matter Suppose syllogism symbols theorems theory things tion triangle true truth universal propositions valid verifiable virtue weight words