From 'The Agnostic's Dilemma' (NYTimes):
When people are incompetent in the strategies they adopt to achieve success and satisfaction, they suffer a dual burden: Not only do they reach erroneous conclusions and make unfortunate choices, but their incompetence robs them of the ability to realize it.
the article also cites:
Justin Kruger and David Dunning, “Unskilled and Unaware of It: How Difficulties of Recognizing One’s Own Incompetence Lead to Inflated Self-assessments,” Journal of Personality and Social Psychology, 1999, vol. 77, no. 6, pp. 1121-1134
these authors have several related articles
20 hours ago