YOU SAID:

I don't know if cats are smarter than me, but I suspect they are.

INTO JAPANESE

猫が私より頭がいいかどうかはわかりませんが、頭がいいのではないかと思います。

BACK INTO ENGLISH

I don't know if cats are smarter than me, but I think they are smarter.

INTO JAPANESE

猫が私より頭がいいかどうかはわかりませんが、頭がいいと思います。

BACK INTO ENGLISH

I don't know if cats are smarter than me, but I think they are smarter.