A little semantics/axiomatics for value predicates. Ok, I know there is a significant literature on this, but it's also fun to do things by oneself! (Billet en anglais pour cette fois-ci)
To be precise is to make it as easy as possible for others to prove one wrong. That is what requires courage.
Etre précis consiste à rendre aussi facile que possible aux autres de démontrer qu'on a tort. C'est cela qui requiert du courage.
(T. Williamson, 'Must do better', 2004.)