I cooperate with the Paperclipper if I think it will one-box on Newcomb's Problem with myself as Omega. This strategy would apply to the first round. For the iterated game, would you thereafter apply Tit for tat?
The strategy applies to every round equally, if the Paperclipper is in fact behaving as I expect. If the Paperclipper doesn't behave as I expect, the strategy is unuseful, and I might well switch to Tit for Tat.
I will one-box on Newcomb's Problem with you as Omega. As in, I really will. That's what I think the right thing to do is.
Would you care to play a round of high-stakes prisoner's dilemma?
Followup to: The True Prisoner's Dilemma
For everyone who thought that the rational choice in yesterday's True Prisoner's Dilemma was to defect, a follow-up dilemma:
Suppose that the dilemma was not one-shot, but was rather to be repeated exactly 100 times, where for each round, the payoff matrix looks like this:
As most of you probably know, the king of the classical iterated Prisoner's Dilemma is Tit for Tat, which cooperates on the first round, and on succeeding rounds does whatever its opponent did last time. But what most of you may not realize, is that, if you know when the iteration will stop, Tit for Tat is - according to classical game theory - irrational.
Why? Consider the 100th round. On the 100th round, there will be no future iterations, no chance to retaliate against the other player for defection. Both of you know this, so the game reduces to the one-shot Prisoner's Dilemma. Since you are both classical game theorists, you both defect.
Now consider the 99th round. Both of you know that you will both defect in the 100th round, regardless of what either of you do in the 99th round. So you both know that your future payoff doesn't depend on your current action, only your current payoff. You are both classical game theorists. So you both defect.
Now consider the 98th round...
With humanity and the Paperclipper facing 100 rounds of the iterated Prisoner's Dilemma, do you really truly think that the rational thing for both parties to do, is steadily defect against each other for the next 100 rounds?