YOU SAID:
I don't know what I do not know
INTO JAPANESE
私は知らないのか分からない
BACK INTO ENGLISH
I do not know I do not know
INTO JAPANESE
わからないわからない
BACK INTO ENGLISH
I do not understand I do not understand
INTO JAPANESE
わかりませんわかりません
BACK INTO ENGLISH
I do not understand I do not understand
You've done this before, haven't you.