reductio ad absurdum

Reductio ad absurdum (Latin: "reduction to the absurd") also known as an apagogical argument, reductio ad impossibile, or proof by contradiction, is a type of logical argument where one assumes a claim for the sake of argument, derives an absurd or ridiculous outcome, and then concludes that the original assumption must have been wrong as it led to an absurd result.
See more at Wikipedia.org...

Noun
1. (reduction to the absurd) a disproof by showing that the consequences of the proposition are absurd; or a proff of a proposition by showing that its negation leads to a contradiction
(synonym) reductio
(hypernym) disproof, falsification, refutation

Reduction to the absurd. (proving the truth of a proposition by proving the falsity of all its alternatives)

reductio ad absurdum
danh từ phương pháp bác bỏ một luận đề (bằng cách chứng minh, nếu lý giải chính xác theo từng chữ, nó sẽ dẫn đến một cách vô lý)
(C) 2007 www.TừĐiểnTiếngViệt.net

n. การกลับกลายเป็นเรื่องน่าขำ, ข้อพิสูจน์ที่กลายเป็นเรื่องเหลวไหล