There seldom is any rational to these "evolution is just not true no matter how much you say it is true" .
The reason being that most who make the claim simply are not arguing against evolution.
Instead they are arguing against some bizarre concept they claim is evolution and are not the least bit interested in the truth.
I also agree.
Yet, I see this on religious side much of the time as well.
And like most debates, the people who are meeting at the level where the error is being made, pretty much just perpetuate the error. I realize from one's own bias, this will be denied.
But if someone such as rusra02 makes claim that "it is not observable fact" and response is pretty much, "evolution is observable fact," it is pretty much perpetuating the error, or at very least not advancing anything. Like if someone says to me, "God is made up illusion," and I say, "God is not made up illusion," how much have I actually overcome the error? Even a teeny tiny bit?
However, on this issue, I've started to go through the material that is there to educate one and all. So, it can't be said (so easily) that I am arguing against some bizarre concept I claim is evolution; and instead am scrutinizing the material. To which I've realized after going through about 10 pages, with scrutiny of the material is enough to generate lots of counter assertions. So, even going through the material in a highly scrutinized way seems not sufficient for many. Unless...
...one goes through material, essentially says, 'ah, now I think I get it. With this I can agree and would like to advance this field of study further. But I have just a few questions for clarification...'
If that is the attitude brought into any field of study (and I do mean any), those around who are truly there to help, will earnestly do so. But start off on the foot that says, "this is all hogwash, and is all pointless drivel that I shall expose constantly for the stupidity that I think it is," and regardless of the field of study, there will be people pouncing on you left and right, especially if you are outnumbered and 'defenders' are under bizarre impression that truth is in need of some human made, emotionally based, defense.