Wow Rammie, you're biting off alot with this one. I can agree with most of what you are saying, but we may end up just dealing with semantics if we go too far with this one.
You appear to start with the assumption that all humans search for "truth". I would disagree with part of that and say that some people search for truth, and some just look for an excuse (or something besides "truth").
And I would argue that if someone is searching for the truth, then that would place the "truth" into the "unknown" category, and that any "truth-seeker" would have to examine *ALL* possibilities in their quest for the truth, including the supernatural possibilities. So yes, if someone is a truth-seeker, they have to examine *all* things. To deny anything without first seeking it out would make someone something other than a truth-seeker.
But, if someone is looking for something besides the truth (which *ALL* people do to some extent), then it would be expected that they would automatically cut out any categories of knowledge that conflicted with their personal pursuits.
I believe seeking is part of finding the truth. If you refuse to look somewhere or into some particular category, you cannot find the truth.
I could go on and on with this one, but I will spare everyone, lol.