The important thing to note is that the science and math supported the conclusion: when others tested it they found it supported as well. There's a precedence in science for ridiculous but true things winning out in the end. That's why peer-review exists.
Or do you mean the claims of scientists? Yeah, we rely on something called peer-review to help us determine the accuracy of science. We can expect a bit of honesty because other scientists would say "hey, that's wrong" if something was.