YOU SAID:
I wonder how smart that person is in reality
INTO JAPANESE
あの人は実際どれくらい頭がいいんだろう
BACK INTO ENGLISH
How smart is that person really?
INTO JAPANESE
その人は本当にどれくらい賢いのでしょうか?
BACK INTO ENGLISH
How smart is that person really?
You've done this before, haven't you.