[Natural Law]

"You must have Peter in mind."

Not only is that wrong, it is one of the more blatant attempts at mind reading I have witnessed to date.

[Religion Moderator]

The way it is worded, it is an expression of the poster's mind - not a reading of yours - though it pushes the envelope.

For example, "You must be thinking of the Red Sea" is not making it personal. It is tentative, like a question, i.e. "Are you thinking of the Red Sea?"