30th
idiotization aversion (by anology to loss aversion)
Loss aversion is a cognitive bias where we are more afraid of losing what we already have than failing to achieve an equal magnitude gain (provided the quantity in consideration is a small proportion of total wealth).
Becoming stupider or becoming smarter by the same degree should have the same cost/benefit. Lack of intelligence is equivalent to loss of intelligence. Yet people shudder at the thought of being stupider, but think nothing of not being smarter. They think they would make all sort of horrible and stupid decisions were they less intelligent, but would never imagine themselves acting differently in a better way if they were smarter.
As Eliezer Yudkowsky said, “only knowledge can fortell the cost of ignorance”, so “only intelligence can fortell the cost of stupidity”.
Application to life? Be very very careful of simply dismissing what you do not understand.