>>104929605>Isn't the "logical" conclusion of the prisoner's dilemma for both to betray?
It depends on the specifics of the problem.
If you make it as simple as possible, you're right. If Guy A and Guy B both interact once, your maximum payoff is usually to betray (but this can change depending on the relative weights of the rewards of each outcome). This sounds like the situation in the page, so to that extent, you're right.
If you have more rounds of the game, or more players, betrayal gets more consequences. If A and B go at it again, and A was betrayed the first time, his logical choice is to betray the dick in kind. If C has been watching, he'll know to betray B, too, and then B ends up being the biggest loser.
Game theorists have ran millions of trials of the dilemma using dozens of different strategies, and the results favor a benevolent actor more and more as reputations build up.