reductio ad absurdum /ri-dukˈshi-ō ad ab-sûrˈdəm or re-dŭkˈti-ō ad ab-soorˈdŭm/

1. Reduction to absurdity
2. The proof of a proposition by proving the falsity of its contradictory
3. The application of a principle so strictly that it is carried to absurd lengths

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