[Lurking Libertarian]

I will not apologize because I know that I know he recanted before he died. This is the end of it.

How do you know?

Were you there?

Did someone who was there tell you?

Did you perhaps learn this in a dream or vision?

[Luis Gonzalez]

"How do you know?"

That's the difference between faith and science.

Faith = I believe it because I believe it.

Science = I believe it because I see it, because I've seen proof of it, or because the preponderance of the available data supports that belief.