Exactly what I was trying to say. I'm a biology major and have no doubt that evolution is correct, but it is still only a theory and can easily be disproven if evidence is found that indicates something else is responsible for the diversity of life. That evidence hasn't been found and probably does't exist.
I think that a lot of people don't understand that the goal of science isn't to push some idea as indisputable truth but to find the best explanation for natural processes. I've talked to creationists who are convinced that scientists are biased towards evolution and ignore other explanations and evidence. My response is first that once you start seriously studying biology you learn there is a huge amount of evidence supporting evolution, far more than what you hear in the news or learn in high school science classes. Then I point out that the only arguments I have ever heard creationists use is to point out a gap in the evidence we have to support evolution and then twist it in anyway that they can to fit in with their religion. And the scientists are the biased group?
All direct quotes from online Christian fundamentalist forums. 
