蓋がい然ぜん性せい

noun

probability; likelihood

Formal, somewhat technical noun used in academic, legal, or philosophical contexts to express the degree of certainty or chance that something will happen. Often interchangeable with 確率, but 蓋然性 emphasizes the qualitative aspect of likelihood rather than a numerical probability.

• この理り論ろんの蓋がい然ぜん性せいは高たかいと評ひょう価かされた。

  The probability of this theory was evaluated as high.

• 裁さい判ばんでは、証しょう拠この蓋がい然ぜん性せいが争そう点てんとなった。

  In the trial, the likelihood of the evidence became the point of contention.