Knowledge as Achievement -- Greco's Double Mistake

John Greco claims that knowledge is a kind of achievement. The value achievements have (as such) shows, according to Greco, why knowledge is better than mere true belief. I argue that, for a variety of reasons, it is not always good to know. Furthermore, it is wrong to think that achievements are always good – think of achieving what is bad. Greco is mistaken twice; this leaves the idea that knowledge is a kind of achievement intact.