Yglesias:

I think it's important for scientists, teachers, secular people, and basically everyone to recognize that nothing about the scientific theory of evolution demonstrates that the biblical account is mistaken... It's perfectly consistent with the evidence available to assert that, 10,000 years ago, God created the universe including a fossile that, had you examined it at the time, would have appeared to be 990,000 years old.

My first reaction was, "Huh? Doesn't Yglesias have a degree in philosophy? Shouldn't he know such ideas don't merit serious consideration?" The issue is that it's "perfectly consistent with the evidence" that reality is just an illusion generated by a malignant demon, as Des Cartes pointed out, but such speculations do not merit consideration outside philosophy class.

Then again, I've also noted elsewhere that science can't prove that God didn't subtly influence evolution. This possibility will be accepted even by people who don't think its necessary to explain the evidence, based on the belief that God subtly influences everything. However, it's much harder to come up with a reason for thinking God would design a young earth to look old. I know Answers in Genesis takes an attitude of "forget the evidence, we just assume Genesis is literally true," but they don't take the step of endorsing a such an extreme-philosopher's-skepticism-type idea as true.