Ask 100 people your age, your sex and roughly your background to estimate on a scale of 0 to 100, where they think they fall on sense of humor or driving skills? It ends up that about 95% will put themselves above average (50%). This proves one or both of the following:
a) Many of us overestimate ourselves
b) Many of us underestimate others
Therefore we can only assume that if we asked the same folks to rate how carefully they have thought out their position on the existence of a god we’d find a disturbingly high number of over-raters. It would not matter if those people asked were Theists or Atheists !
NOW! Ask all those folks to rate themselves on overrating themselves or underestimating others !
Linguistic Note: The nose & overconfidence seem to be related. “Arrogance” in Japanese is “HanaTaka” which means “long/tall nose”. English uses stuck up to describe the nose display for this emotion. Interesting, eh?
Source: This is very old information, of course, and here is one source hinting at these finding (sorry, can’t find the real McCoy).