아닌 것 같은데

I don't think so

→ 아니다
phrase Rare #15,122
I don't think so A conversational way to express doubt or disagreement, literally meaning “it seems not to be.” The ending -는데 can make the statement sound tentative or invite a response.
KO: 이게 맞는 답은 아닌 것 같은데.
EN: I don't think this is the right answer.

이리로 가는 게 아닌 것 같은데 이리로 가는 거 야?

It doesn't seem like it's going this way, so why are you going this way?

— 이중 배상 (1944)

고향이 로마 아닌 것 같은데, 어디 지?

I don't think your hometown is Rome. Where is it?

— 달콤한 인생 (1960)

아닌 것 같은데

I don't think so

— 어느 가족 (2018)

그건 아닌 것 같은데.

I don't think so.

— 퍼펙트 스트레인저 (2016)

그래, 그런데 이 춤은 이렇게 추는 아닌 것 같은데

Yeah, but I don’t think this is how you’re supposed to do this dance.

— 달콤한 인생 (1960)