'Know' in the Bible

When he inadvertently touches the uncleanness of a human being, whatever his uncleanness that made him unclean may be, when he himself comes to know about it, he will be guilty.

"If a person sins and does what the LORD commanded is not to be done, and if he didn't know that he had sinned, then he will be guilty nevertheless.

in order for your future generations to know that the Israelis lived in tents when I brought them out of the land of Egypt. I am the LORD your God."