"If you add exercise to a person's lifestyle without adding calories, they will lose weight. It's that simple. There is research to show this. I cited some of it."

That's great. There is also research that shows that acceleration due to gravity at sea level is 9.8 m/s^2, but that has little to do with what the OP said, which is that "exercise tends to increase people's appetites." You're refuting something he never claimed.

"He never, in his entire blog post, mentions the fact that the fat person is also eating 7 extra strips of bacon each day."

I'm guessing because that's not the case? You're begging the question by showing that his claims don't work out according to the calories in/calories out model.