The spectacle of watching politicians fall over each other to distance themselves from research validated by armies of scientists is more than depressing. Our current understanding of climate, for example, represents the work of thousands of human beings all working to make mistakes as fast possible, all working to root out error as fast as possible. There is no difference between what happens in climate science or evolutionary biology and any other branch of science.
Honest people asking the best of themselves push forward in their own fields. They watch their work and those of their colleagues closely, always looking for mistakes, cracks in reasoning, subtle flaws in logic. When they are found, the process is set in motion: critique, defend, critique, root out. When science deniers trot out the same tired talking points, talking points with no scientific validity, they ignore (or fail to understand) their argument's lack of credibility.
Eventually, science always finds its mistakes. Eventually we find some kind of truth, unless, of course, mistakes are forced on us from outside of science. That, however, is an error of another kind entirely.