Is there anything you don't know and I don't know?

This matter is a secret between two people.

It means that this matter is extremely secret, and even the omniscient "God" doesn't know, and no one knows except the parties. This is an exaggeration, emphasizing the privacy and confidentiality of things. It can be understood as one-liners or jokes.

When friends share a little secret, it means that only two people know it, which enhances mutual trust and closeness. In real life, it does not have practical philosophical or mysterious significance, but is just a rhetorical expression in oral communication.

Solemnly declare: The above information represents personal position and is for reference only.