When do you really know someone? (genuine question, EASY)

Honestly, I think you genuinely know someone when you think you do.
You have to know them for a while, though. Because, their behaviour could just change out of no where. But, it could take a lot of time.

You know someone when you are able to notice something so small about them that they can’t even see in themselves. You know everything about them as well as knowing their behavior. One can say that if you really know someone you be able to know everything that they are thinking and what they are gonna do but that’s not the case. You know someone if you are able to understand why they do something without even questioning it.

Answerthe transcendentalists where individualismthey believed in christian unitarianism