principle of sufficient reason
A philosophical term referring to the principle that everything must have a reason or cause. Often discussed in the context of Leibniz's philosophy. Related to the concept 充足理由の原理.
See also: 充足理由の原理
Leibniz made the principle of sufficient reason the foundation of his philosophy.
理由の原理によれば、すべての事象には説明が存在する。
According to the principle of sufficient reason, there is an explanation for every event.
A calque from the philosophical term 'principle of sufficient reason' (German: Satz vom zureichenden Grunde), composed of 理由 (reason) + の + 原理 (principle).