A great quote that sums up the ideas of credibility and error statements quite well.
“The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts.”
– Bertrand Russell
ClimateSight
Climate science from the inside
ClimateSight 
Very true – here’s one on similar lines:
If a fool can see his own folly,
he in this at least is wise;
but the fool who thinks he is wise,
he indeed is the real fool.
(Sayings of the Buddha)
Well said.