Over the last few months, an effect and a term have come to mind through my reading, listening, watching, observing.
People with limited knowledge or competence have a tendency to overestimate their own knowledge or competence. They often i) overestimate themselves, ii) misunderstand the competence of others, and iii) fail to recognize their own gaps and a need to educate themselves and acquire knowledge.
Dunning-Kruger Effect. David Dunning/Justin Kruger. Unskilled and Unaware of It: How Difficulties in Recognizing One's Own Incompetence Lead to Inflated Self-Assessments" (2000, Journal of Personality and Social Psychology)