I think the expression you are looking for is "common knowledge". It's something that you know that the other guy knows you know and so on. https://en.wikipedi

I think the expression you are looking for is "common knowledge". It's something that you know that the other guy knows you know and so on. https://en.wikipedia.org/wiki/Common_knowledge_(logic) https://en.wikipedia.org/wiki/Common_knowledge_(logic)