I have always been amused by people claiming X is perfect or Y is perfect. Except when one points out some flaws in X or Y, their retort is that I should not be so picky about each individual detail. It always makes me laugh and reminds me a quote of Einstein – “No amount of experimentation can ever prove me right; a single experiment can wrong me wrong.” Ergo, even one tiny error in a trillion makes X, Y or anything else in the universe “imperfect”. But then explaining this is pointless because the folks who call many of these things perfect never really used logic before they made their claims.