The problem with so many psychotics is that they are so convincing to the uneducated.
"It would appear to be an indelible human trait that the 'truth' about most issues usually goes through three distinct phases known colloquially as "the three stages of truth".
During the first stage, the issue goes unnoticed and is ignored.
The second stage is characterized by a period of vehement denial.
The third stage witnesses the truth about the issue being recognized as self-evident."
from: Weather Wars Website