v.tr. Logic alter (a proposition) so as to infer another proposition with a contradictory predicate, e.g. no men are immortal to all men are mortal.
Derivatives:
obversion n.
Etymology: L obvertere obvers- (as OB-, vertere turn)
v.tr. Logic alter (a proposition) so as to infer another proposition with a contradictory predicate, e.g. no men are immortal to all men are mortal.
Derivatives:
obversion n.
Etymology: L obvertere obvers- (as OB-, vertere turn)
Oxford English vocab. Оксфордский английский словарь. 2012