Words can have different meanings dependent upon context and audience. Again, the point is just because the same word is used in different contexts doesn't mean the word means the same thing.

Let me try to clarify: I believe in lots of things, but I'm ready to change that belief when presented with compelling evidence. A person of faith believe things and that belief is not going to change despite plenty of evidence.

See, I used the same word but it meant something else. This whole exchange is about the false equivocation of science and religion; (good) science embraces the notion of falsification, because it wants to "believe" in whatever truth presents itself.

This distinction is paramount, because religious fundamentalists believe that their faith trumps science. And yes, there's a bitter irony in the wording I just used.