YOU SAID:

What do you think he would have thought if you had thought that?

INTO JAPANESE

彼が考えたことを考えたかどうかは何だと思いますか。

BACK INTO ENGLISH

What do you think whether or not thought that he thought?

INTO JAPANESE

彼が考えたことを考えたかどうかは、何を思うか。

BACK INTO ENGLISH

What do you think about whether he thought of what he thought?

INTO JAPANESE

彼が思ったことを考えたかどうか、どう思いますか？

BACK INTO ENGLISH

What do you think about whether he thought of what he thought?