I consider faith in human reasoning, even if not explicit, as a prerequesite for any meaningful discussion, and I would think that this is something most will develop faith in through their individual experience. I think it is difficult for me to argue in favour of reason without some reasoning, and that could perhaps be called circular logic.
I agree that human reason is very useful, for this inquiry included. Which is why I'm attempting to reason here with my fellow members.
It is however entirely reason-able to use human reason to explore the limits of human reason. Is is possible to fall in love using only reason? Nope. A limit of reason discovered, using reason. Not in the least complicated, esoteric or bizarre etc.
I certainly can not prove the rules of human reason are not binding on all of reality, and it's not even my desire to do so. It is however easy to demonstrate that such a thing has not been proven, and thus can be reasonably declined until further notice. It's also easy to make a case that a species as small and young and nutty as ourselves is unlikely to have uncovered the rule book for all of reality, the HUGE realm which is the scope of god claims.
Using only reason, we should be able to see that the theist vs. atheist debate is reasonably labeled a merry-go-round to nowhere. Thousands of years, and still no resolution, or hope of one. For me, the point of challenging atheism is not to sell theism (the usual motivation) but to reveal the entire debate is a hopelessly flawed dead end.
The purpose of selling that proposition is to open our minds to trying something else, which will most likely have to be something fundamentally different than the usual routine.
Theism and atheism share the assumption that the point of the inquiry should be to find The Answer, to create a knowing, a conceptual object which accurately represents reality.
If you believe in evidence, please consider this evidence developed over thousands of years. That assumption
is NOT WORKING. No answer has been found which can not be successfully challenged in a handful of keystrokes.
The rational thing to do when some process fails repeatedly over thousands of years is to..... try something else. But what?
Stick with the inquiry if it interests us, but abandon that which has been proven not to work. Abandon the search for The Answer.
And new doors may open up. But we won't see those new doors or walk through them so long as we are addicted to riding the merry-go-round to nowhere.