YOU SAID:

I think Michael is dumb

INTO JAPANESE

マイケルは馬鹿だと思う

BACK INTO ENGLISH

I think Michael is stupid

INTO JAPANESE

マイケルはバカだと思う

BACK INTO ENGLISH

I think Michael is a fool

INTO JAPANESE

マイケルはばかだと思う

BACK INTO ENGLISH

I think Michael is a fool