If aliens cooperate in a way independent on your decision, you should defect. Only if they cooperate conditional on your cooperation, it might make sense to cooperate. That is, who cooperates unconditionally is irrelevant. (Which of these do you mean? I can’t tell, taken literally you seem to be talking about unconditional cooperation.)
What I should have been saying is that the ones that cooperate conditionally are the ones that would matter. (I wasn’t even thinking about conditional and unconditional cooperation, at the time.)
If aliens cooperate in a way independent on your decision, you should defect. Only if they cooperate conditional on your cooperation, it might make sense to cooperate. That is, who cooperates unconditionally is irrelevant. (Which of these do you mean? I can’t tell, taken literally you seem to be talking about unconditional cooperation.)
What I should have been saying is that the ones that cooperate conditionally are the ones that would matter. (I wasn’t even thinking about conditional and unconditional cooperation, at the time.)