Let's consider this trio of frameworks in physics, every one of which has been tested over and over:

(1) Newton
(2) Einstein
(3) Heisenberg

Just mentioning those names may effect a situation of " 'nuf said."

Extrapolate from any one of those systems beyond a given point, and one runs into conflicts with one or both of the others, many of which (as far as I know) to this day puzzle the heck out of all persons who are competent to puzzle over the same.

The posts I linked to previously, discuss much the same in the fields both of psychology and religion.

But then again, religion (I thought) was our topic here.

In the end, ya gotta go with whatcha got, and not fret too much over how certain you can be of whatcha got. As to how uncertain anyone else "should" be, of what they got I don't think that deserves any attention at all.

P.