I think this can be somewhat clarified (and made less spooky) by observing that it’s closely related to the concepts of kin selection and inclusive fitness (in evolutionary biology). It is in fact a good evolutionary strategy to be more cooperative when dealing with organisms that are closely related to you. The “Perfect deterministic twin prisoner’s dilemma” you propose is simply a special case of this where the organism you’re dealing with is a clone.
I think this can be somewhat clarified (and made less spooky) by observing that it’s closely related to the concepts of kin selection and inclusive fitness (in evolutionary biology). It is in fact a good evolutionary strategy to be more cooperative when dealing with organisms that are closely related to you. The “Perfect deterministic twin prisoner’s dilemma” you propose is simply a special case of this where the organism you’re dealing with is a clone.