I don't know

IPA(Pronunciation)

Phrase

Japanese Meaning

質問に対して、答えや対応方法を知らないことを示す表現。 / 自分の知識や情報が不足している状態を意味する。 / 疑問や問い合わせに対して、知らない・分からないという意思表示をする言い回し。

I don't know which train to take to get to the museum, so I'll ask someone at the station.

どの電車に乗れば博物館に行けるかわからないので、駅で誰かに尋ねます。

Sense（1）

Mr. Schidtler: Does anybody here have any idea why "Inestine" was regarded as a great scientist? Kevin?

Kevin: Oh, uh, I don't know.

Sense（2）

A reason and common excuse used to state that a person is unclear of why something did or did not happen, or is or is not the case.

I don't know why Blip just shuts off the power and then blames it on the weather.

Sense（3）

A phrase used to indicate that one is speculating (often used sarcastically when stating the obvious).