File this under “Duh”:
A study at Loyola University suggests that people who believe themselves experts in a field are fairly close-minded towards new ideas. That’s a problem, but another one is often a bigger headache: The number of people who become experts in a field who then think that makes them authorities in unrelated fields. That problem is why we have people asking celebrities about politics and politicians about how to save money.
Shorter version: “I don’t know, why don’t you ask Noam frigging Chomsky what the Check Engine Light means?”
Not to humblebrag or anything, but the subjects on which I can claim even marginal expertise can be counted on the fingers of one hand and still leave one finger to raise at anyone who dares question me. (Which, as you’d know if you’d read this site for more than a couple of days, is pretty much everyone.)