reductio ad absurdum


re·duc·tio ad ab·sur·dum

noun \ri-ˈdək-tē-ˌō-ˌad-əb-ˈsər-dəm, -ˈdək-sē-ō-, -shē-, -ˈzər-\

Definition of REDUCTIO AD ABSURDUM

1
:  disproof of a proposition by showing an absurdity to which it leads when carried to its logical conclusion
2
:  the carrying of something to an absurd extreme

Origin of REDUCTIO AD ABSURDUM

Late Latin, literally, reduction to the absurd
First Known Use: 1741

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