Permise is false. Not an either or. Both are factually valid reasons to use the bombs. Another thing to consider. The food distribution network was breaking down. Japan was on the verge of wide spread starvations. Besiging Japan would of kill far more Japanese via starvation and disease then dropping the bombs did.
Can't agree with ya here.If there was a legitimate reason to drop the bomb on the Japanese....and I think a *very* powerful argument can be made that there were at least two...then that's fine.In such a scenario,if Truman's attitude was "hey,doing so would save 500,000 allied troops...and,as a bonus,it would scare the hell out of Stalin"...then it's all the better.
But doing it without a compelling reason that's directly connected to the war with Japan would have been wrong,IMO.