'Fact' in the Bible

And put to death the Lord of life; whom God gave back from the dead; of which fact we are witnesses.

And he went out after him; and he was not certain if what was done by the angel was a fact, for it seemed to him that he was seeing a vision.

Seeing that you are able to make certain of the fact that it is not more than twelve days from the time when I came up to Jerusalem for worship;