reductio ad absurdum

noun re·duc·tio ad ab·sur·dum \ri-ˈdək-tē-ˌō-ˌad-əb-ˈsər-dəm, -ˈdək-sē-ō-, -shē-, -ˈzər-\

Definition of reductio ad absurdum

  1. 1 :  disproof of a proposition by showing an absurdity to which it leads when carried to its logical conclusion

  2. 2 :  the carrying of something to an absurd extreme

Origin and Etymology of reductio ad absurdum

Late Latin, literally, reduction to the absurd

First Known Use: 1741

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a rounded knoll or a ridge of ice

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