'Know' in the Bible

Now I want to remind you, though you know all these things: The Lord first saved a people out of Egypt and later destroyed those who did not believe;

You also know that the angels who did not keep within their proper domain but abandoned their own place of residence, he has kept in eternal chains in utter darkness, locked up for the judgment of the great Day.

But these speak evil of those things which they know not: but what they know naturally, as brute beasts, in those things they corrupt themselves.