YOU SAID:
How am I supposed to know you ididot.
INTO JAPANESE
どうやって君を知ってるんだ?
BACK INTO ENGLISH
How do you know you
INTO JAPANESE
どうして分かるのですか
BACK INTO ENGLISH
how do you know
INTO JAPANESE
どうして分かるのですか
BACK INTO ENGLISH
how do you know
That didn't even make that much sense in English.