Yes, for instance, the believe that the earth is young. As in: 7000 years young. Or put differently: Far too young for evolution to have worked at all.
Sorry, but there really is a fundamental problem with being a biologist if your stated belief makes one of the core principles of your field impossible. From what I can tell, most of the young-earth creationists that are biologists mainly work in trying, for decades now, to disprove evolution.
You can look at rational empiricism as a kind of logic game.
Given a set of empirical observations and the premise that the laws of the universe are constant everywhere and every-when, what logical inferences can you make about the world?
You don't have to necessarily believe the conclusions, but you can still do good science just by trying to play the game well.
Now it's hard to me to imagine a mind working that way but I don't see that it's impossible.
Sorry, but there really is a fundamental problem with being a biologist if your stated belief makes one of the core principles of your field impossible. From what I can tell, most of the young-earth creationists that are biologists mainly work in trying, for decades now, to disprove evolution.