Fraa Erasmas: "Our opponent is an alien starship packed with atomic bombs. We have a protractor."
That line, and everything after that point, made that book worth reading. It was frankly uninteresting until that it was suddenly made clear that the next 500 pages would involve defeating the opponent using applied and weaponised platonic epistemology.
I agree with the review to some extent, but having read the book three times at this point, I put this up with Snow Crash as an example of what Stephenson can do. Now can someone make a mini-series or movie out of his books already!
Yes, I wrote the TVTropes.org entry of Anathem and I stole some of it.