Does Buddhism claim perfection?

Does it claim to perfectly describe the nature of this world and all of mankind without contradiction as other religions do? I read this article: http://approachingaro.org/certainty . The author says: > Buddhism is unique, as far as I know, in insisting that the kind of answers we want cannot be had, anywhere. Emptiness—inherent uncertainty—is at the heart of Buddhism. For this reason, Buddhism is sometimes described as “The Way of Disappointment.” If we follow it sincerely, Buddhism repeatedly crushes our hope that somehow it will satisfy our longing for answers; for ground we can build on; for reliable order. I know this may just be an opinion. If this is true, it seems contradictory to me. It's in and of itself a claim of certainty that we, as human beings, can never attain certainty.