this takes us back to the subject of agnosticism. Always challenge facts that you can’t demonstrate scientifically or logically. This can leads to the extreme. Challenging everything. For instance, what is reality? Obviously, what I see, hear, smell, touch or taste is not the same that someone else will experience. It can go even further. Time for instance is different for everyone. The notion of time itself can be, and is by some scientists, considered as irrelevant. (hours, minutes, seconds, etc is totally subjective. Man made to suit our needs).