a Roman Catholic system of casuistry that when expert opinions differ an actor can follow any solidly probable opinion that he wishes even though some different opinion might be more probable(philosophy) the doctrine that (since certainty is unattainable) probability is a sufficient basis for belief and action
英汉双解大词典
probabilism/ˈprɒbəbɪˌlɪzəm/
1.
N（名词）
the doctrine that although certainty is impossible, probability is a sufficient basis for belief and action 盖然率; 概率论 [philosophy]