Evolution isn't "fact," it just happens to be our current best explanation. Of course evolutionary theory will be reworked extensively, or perhaps even replaced, as we get more information. Just because it isn't perfect at this exact moment doesn't mean you shouldn't place *any* stock into it. I'm not trying to say dissent is bad (hell, it's what makes science science). But by that same token, if we didn't make some educated guesses and assumptions in science, we wouldn't get anywhere.