ignoratio elenchi

noun
ig·​no·​ra·​tio elen·​chi | \ˌig-nə-ˈrä-tē-ˌō-i-ˈleŋ-ˌkē \

Definition of ignoratio elenchi 

: a fallacy in logic of supposing a point proved or disproved by an argument proving or disproving something not at issue

First Known Use of ignoratio elenchi

1588, in the meaning defined above

History and Etymology for ignoratio elenchi

Latin, literally, ignorance of proof

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The first known use of ignoratio elenchi was in 1588

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