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Can someone tell me the meaning of the phrase :" for me to know for you to find out "
It seems to be very simple but I wonder if there are other meanings behind it.
This happens when I asked a friend a question, and that was what she shot back at me. She definitely has the answer, but why she uses the "for me to know" ?
She wants to keep it a secret -- she's saying, "This knowledge is something that I am allowed to know, but you must find out for yourself".
It's an unusual construction with the verb "know", which is why it's confusing. She is implying that this is the way it was intended to be. This idiom is often used when people don't want to answer some personal question.
"for me to know for you to find out " ? 
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