When Confronted with An Explanation that is Based on Mathematics

[sfer]

Because we're naturally inclined to learn experientially, and building models is like the opposite way to learn. It's why bad poker players make terrible plays for years, like not value betting the river enough in HE. They remember the times they get raised/checkraised rather than thinking mathematically about what exactly they're risking and how often they have to be right.

Also, explaining modern portfolio theory to someone who is disinclined to want to listen is the most frustrating thing on earth.