Last time I checked, if you prove something, you "know" it.
Therefore your first example (do you know?) contradicts your third example (have you proof?). Unless you think you can prove something and yet not know it to be true...which seems completely backwards.
As for Arcanus' wording, I think "conclusively established" is a better way of phrasing it for a scale, given that people tend to argue about absolute and relative proof / knowledge.
Therefore your first example (do you know?) contradicts your third example (have you proof?). Unless you think you can prove something and yet not know it to be true...which seems completely backwards.
As for Arcanus' wording, I think "conclusively established" is a better way of phrasing it for a scale, given that people tend to argue about absolute and relative proof / knowledge.
