There is no objective definition or diagnosis of mental disability.
Vaclav Havel in his 1968 Livingin Truth, The Power of the Powerless on dissent;
"You do not become a "dissident" just because you decide one day to take up this most unusual career. You are thrown into it by your personal sense of responsibility, combined with a complex set of external circumstances. You are cast out of the existing structures and placed in a position of conflict with them. It begins as an attempt to do your work well, and ends with being branded an enemy of society."