Reductio ad absurdum—A reduction of an adversary's conclusion to an absurdity.
And so Gersonides proceeds to demolish Maimonides's position by reducing it ad absurdum.
Housewife in fact she was in excelsis, not to say ad absurdum.
An argument whereby one seeks to prove one's position by pointing out the absurdity or foolishness of an opponent's position. Also, an argument carried to such lengths that it becomes silly or ridiculous. From Latin, meaning “to absurdity.”