I asked this question with an answer in mind.
In the opening paragraph of my answer (posted several days later), I expressed the fear that "some Southerner, particularly Georgian" with a better knowledge of the local terrain would point out that Johnston had blundered because Atlanta was a "second best" defensive site compared to say, Kennesaw Mountain. Or that Hood was correct in his apparent belief that "the terrain around Atlanta was better for offense than defense," when he adopted a risky strategy of trying to "pick off" Union armies one by one.
I was much more confident of my answer when no such "pushback" occurred.
I had a thesis, and had identified one exception (California) that I could explain to my satisfaction. Basically, I wanted to know if I had overlooked other counterexam;ples that were not so explainable.
So is it okay to ask, "I believe that such and such was true historically. Do you know of any counterexamples that would invalidate my thesis?"
One of my bosses once said, the thing to fear most is not what you know about your job, but what you DON'T know.