“Prior” is like a get out of jail card. Whenever the solution to some problem turns out to conveniently depend on an unknown probability distribution, you can investigate further, or you can say “prior” and stop there. For example, the naive Bayesian answer to game theory would be “just optimize based on your prior over the enemy’s actions”, which would block the route to discovering Nash equilibria.
It’s true that it’s worthwhile to investigate where priors ought to come from. My point is only that you can still put Bayesianism to work even before you’ve made such investigations.
“Prior” is like a get out of jail card. Whenever the solution to some problem turns out to conveniently depend on an unknown probability distribution, you can investigate further, or you can say “prior” and stop there. For example, the naive Bayesian answer to game theory would be “just optimize based on your prior over the enemy’s actions”, which would block the route to discovering Nash equilibria.
It’s true that it’s worthwhile to investigate where priors ought to come from. My point is only that you can still put Bayesianism to work even before you’ve made such investigations.