Lunatics

“A lunatic is easily recognized. He is a moron who doesn’t know the ropes. The moron proves his thesis; he has a logic, however twisted it may be. The lunatic, on the other hand, doesn’t concern himself at all with logic; he works by short circuits. For him, everything proves everything else. The lunatic is all idée fixe, and whatever he comes across confirms his lunacy. You can tell him by the liberties he takes with common sense, by his flashes of inspiration, and by the fact that sooner or later he brings up the Templars.”

Umberto Eco – Foucault’s Pendulum