理をもって非に落ちる、
理を以て非に落ちる
(kanji info)
りをもってひにおちる (riwomottehiniochiru)、 りをもちてひにおちる (riwomochitehiniochiru)
- 1. [exp] to lose an argument despite being in the right; to have the right on one's side, yet succumb to another (rare)