I disagree that this thread is "just nitpicking each other" - I think it's been both educational and civil. For instance, when masondixon learned that Reagan had a political career before his presidency, masondixon thanked dbmikus for pointing it out. It's hard to find that level of candor on an internet discussion board - and masondixon seemed to want a genuine dialog that was free of the ad-hominem attacks that he or she had apparently been experiencing on other sites.
In regards to your "argument", I don't find it convincing:
> My argument is you are as good as any statesman so long as you have a working brain.
I disagree. My brain works reasonably well, but I don't consider myself fit to fill the office of the presidency - for a wide variety of reasons. I have no understanding of large portions of the world or even of the United States itself. I don't know how economics works on a macro scale. Just as I would never hire a person whose brain worked well, but had never written a line of code to fill the most important engineering role in my company, I would never say that just because my brain worked well, that I would be a good statesman or a good choice for president of the United States.