how do you tell the difference between brownies and fudge?

I can immediately tell the difference between brownies and fudge when I see them. But it's hard to actually explain or describe why they are different.

But the best answer I can give is that brownies have flour in them and fudge does not. Brownies are "cake-like" but dense. They are almost like a cake that didn't rise. Fudge is a candy, not a cake.

I guess I shouldn't worry about the distinction of one or the other. I like both so what the heck. Although I think I am a little more inclined toward brownies. I went to a library book sale Saturday and they had a bake sale along with the books. I bought a small plate of what I thought were brownies but it turned out they were fudge. Stuck to the roof of my mouth big time.