Grammar › N1 · 12 Inference and judgment
〜得る・〜得ない: can; possible to
N1 · 12 Inference and judgment
Says that something is possible or impossible in principle.
Verb stem + 得る/得ない. Both うる and える are read; 得る is mostly うる in writing and えない for the negative. Examples: ありうる, 考えうる, ありえない. Not for ability of a person; it is about possibility. Compare 〜られる.
Examples
それは、十分ありうることだ。
That is a perfectly possible thing.
こんな失敗は、あってはならないし、あり得ない。
A mistake like this must not happen, and it is impossible.