[gms7777]

> Stupid people think they know entire breadths of knowledge - call Peter Principle or Dunning–Kruger:

Just to add: Dunning-Kruger is not a problem of "stupid people". We're all susceptible to it, and we all fall victim to it from time to time in different areas. If anything, people with self-perceived "high intelligence", or people that are genuine experts in one field, can sometimes be the most susceptible because they overestimate how much their knowledge transfers.