- Philos. the doctrine that certainty in knowledge is impossible and that probability is a sufficient basis for action and belief
- R.C.Ch. the principle that in matters concerning which there is more than one probable opinion, it is lawful to follow any one of them
Origin of probabilismFrench probabilisme: see probable and -ism
- Philosophy The doctrine that probability is a sufficient basis for belief and action, since certainty in knowledge is unattainable.
- Roman Catholic Church The system of moral theology that applies when the lawfulness of an act is uncertain, by allowing an actor to follow an opinion favoring personal liberty if that opinion is solidly probable, even though an opposing opinion, favoring law, is more probable.