When we said, this is the fact... was it really a fact? When we sure we see the reality, was it the real reality?
We do not know, or at least, I'd love to say that I don't know.
Scientists may say that our reality today only a part of some unknown projection from the event horizon. Religius people would say, what we see today only a fake reality, a transcendent sublime fact or what so ever.
When I don't know, I simply don't know. Perhaps I can not see my self, I have no mirror. But I think I can face something that I see in front of me, even it was hiding my reality.