Personally while I have absolutely no reason to doubt the validity of it I also have personally not spent any time looking through the evidence for it so arguably I personally have no reason to actually agree with the theory other than because people in authority say I should.
I can quote adequately explain why I positively believe atoms exist, that quantum mechanics works and a host of other thing like that, but because of my ignorance I don't actually have a good reason to believe our doubt evolution.