Those who require evidence before giving serious consideration might like to consider this:
If you know everything, then you know how much of it there is, but if you don't know everything then how are you to estimate the portion of it that you don't know?
The portion you don't know might be most of it, for all you know.

I think someone said something like "science has served us well so far..." What makes you think that?
Science seems to work, as far as our limited requirements go, (or as far as its limitations allow us to require) but science might have led us miles down the garden path. It's done that to us before.

John