A biologist can often understand the perspective of a creationist, even if they don't agree with them, because the scientist understands that evolution is a complicated subject, that can be tricky to understand. The creationist on the other hand, almost always fails to understand a biologist, who they almost always disagree with, because the creationist lacks the gumption and intelligence to admit that there is anything they don't understand, and so refuses to learn anything new.