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modus ponens

noun
modus po·​nens | \-ˈpōˌnenz\
plural modi ponentes\-​pōˈnen‧ˌtēz \

Definition of modus ponens 

: a mode of reasoning from a hypothetical proposition according to which if the antecedent be affirmed the consequent is affirmed (as, if A is true, B is true; but A is true; therefore, B is true)

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History and Etymology for modus ponens

New Latin, proposing mode

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