Another question I'd like to stack on top of the OP Topic is:
At what point does something become "Proven?" And if even theories that have been "Proven" in the past have been "Disproven" later on, then can we ever truly declare anything true at all?
I would say simply believing in something does not make it true, not absolutely true anyway. Ultimately Truth is a lot like safety, it doesn't really exist, it is more of a subjective state of mind than it is an objective state of being. Truth presides only until it is disproven, and if it can be disproven then it had no right to be called truth in the first place. There is never a point when you can truly declare something absolutely true, because at any point a revelation of perception or phenomenon could completely contradict your assumptions of what you thought was true, or change the way you look at something, or completely invalidate the evidence you thought you had.
The way I see it is that Truth is defined by essentially what presently works, it is nothing more special or authoritative than that. When something stops being True, it no longer works, and it is time for an update. Our rationalization and understanding of the universe must constantly be updating, we have to assume we are not going to get things right on the first, second, third or even forth try, if we actually want to continue understanding. Over time we do get closer to what we might be able to one day call an absolute or universal truth, but to assume we found it right now just because we think we have evidence, would be idiotic, and essentially making the same mistake the bigger religions have made.