The New Encyclopædia BritannicaEncyclopædia Britannica, 1992 |
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Page 229
... syllogisms of the second and third figures from the syllogisms of the first figure , and by doing so he became the author of the first deductive system in the history of logic . In his deductions , Aristotle made explicit use of the ...
... syllogisms of the second and third figures from the syllogisms of the first figure , and by doing so he became the author of the first deductive system in the history of logic . In his deductions , Aristotle made explicit use of the ...
Page 256
... syllogisms have universal conclusions , from which corresponding particular propositions can be in- ferred ( by passing from " all " to " some " by laws 2.5 and 2.6 ) , there will be five additional valid syllogisms — tra- ditionally ...
... syllogisms have universal conclusions , from which corresponding particular propositions can be in- ferred ( by passing from " all " to " some " by laws 2.5 and 2.6 ) , there will be five additional valid syllogisms — tra- ditionally ...
Page 258
... syllogisms are called pure if they consist of propositions all of which are of the form " pƆq ” ; e.g. , ( 1 ) " If p then q , and if q then r ; therefore if p then r . " Mixed hypothetical syllogisms , however , which have one ...
... syllogisms are called pure if they consist of propositions all of which are of the form " pƆq ” ; e.g. , ( 1 ) " If p then q , and if q then r ; therefore if p then r . " Mixed hypothetical syllogisms , however , which have one ...
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