Chapter Privateer to Probabilist of P by Webster's Dictionary (1913 Edition)

Probabiliorist
(Prob`a*bil"i*o*rist) n. [From L. probabilior, compar. of probabilis probable.] (Casuistry) One who holds, in opposition to the probabilists, that a man is bound to do that which is most probably right.

Probabilism
(Prob"a*bil*ism) n. [Cf. F. probabilisme.] The doctrine of the probabilists.

Probabilist
(Prob"a*bil*ist), n. [Cf. F. probabiliste.]

1. One who maintains that certainty is impossible, and that probability alone is to govern our faith and actions.

2. (Casuistry) One who maintains that a man may do that which has a probability of being right, or which is inculcated by teachers of authority, although other opinions may seem to him still more probable.