Creationists . . . I don't even know where to start. Creationism is more reasonable than Flat-earth theory, but not much. The only real defense there is it is hard to make your own experiments to test evolution. You could see how you are a combination of your parents and extrapolate from there. I suppose you could take a weak antibiotic once a month until you develop some resistant bacteria or something, but that is a whole different variety of bad idea.
As I tell everyone else, there's not a real contradiction between believing in creation and evolution. It's just with creation the evolution starts much, much farther down the line...
