apagogical

[Eng. apagoge; -ical.] Pertaining to apagoge.] Math: An apagogical demonstration is a demonstration of the truth of a proposition by proving the absurdity in which one is landed who proceeds on the supposition of its being incorrect. Its more usual name is a reductio ad absurdum. (Dyche.) ap-a-gō-gy, 8. [APAGOGE.]