And then there's the Dunning-Kruger effect.
My entire business runs on pretending that doesn't exist ![Smiley :)](https://www.eevblog.com/forum/Smileys/default/smiley.gif)
So you pretend it doesn't apply to you?
No, just the business. The business is a facade. If someone comes with a problem, the business must sell an answer or turn a customer away, the latter of which is poor business acumen. Thus the business knows everything and is not subject to that theory, with the disclaimer of a lead time, exploration, analysis and a price. It's my responsibility to make sure that when it applies to me personally, I bridge the gap between ignorance and competence properly before reaching any conclusions. This is how think tanks, research companies and consultancies operate. Well the honest ones anyway.
The dishonest ones usually have a book of answers available ranked in order of cash backhanders for product recommendations.