YOU SAID:
I don't know I'm an idiot.
INTO JAPANESE
私は自分がバカだとは知らない。
BACK INTO ENGLISH
I don't know that I am an idiot.
INTO JAPANESE
私は自分がバカだとは知らない。
BACK INTO ENGLISH
I don't know that I am an idiot.
That didn't even make that much sense in English.