Agree about the semi-clones part. This is similar to the Prisoner’s Dilemma: if you know that everyone else cooperates (presses button 1), you’re better off defecting (pressing button 2). Usually I prefer to talk about problems where everyone has the same preference over outcomes, because in such problems UDT is a Nash equilibrium. Whereas in problems where people have selfish preferences but cooperate due to symmetry, like this problem or the symmetric Prisoner’s Dilemma, UDT still kinda works but stops being a Nash equilibrium. That’s what I was trying to point out in this post.
Agree about the semi-clones part. This is similar to the Prisoner’s Dilemma: if you know that everyone else cooperates (presses button 1), you’re better off defecting (pressing button 2). Usually I prefer to talk about problems where everyone has the same preference over outcomes, because in such problems UDT is a Nash equilibrium. Whereas in problems where people have selfish preferences but cooperate due to symmetry, like this problem or the symmetric Prisoner’s Dilemma, UDT still kinda works but stops being a Nash equilibrium. That’s what I was trying to point out in this post.