気は確か

in one's right mind

→ 気
phrase Rare #43,979
in one's right mind Often used in questions to express disbelief or ask whether someone is thinking clearly.
JA: そんなことをするなんて、気は確かなの?
EN: Are you in your right mind, doing something like that?

気は確かなのか?

Are you in your right mind?

— インディ・ジョーンズ/最後の聖戦 (1989)

酔ってるかもしれないが、気は確かだ。

I may be drunk, but I know what I'm doing.

気は確かかい?

Are you in your right mind?

あなたたち二人とも気は確かなの?

Are you two out of your minds?