If the prisoner's dilemma game is played only once, what would we NOT expect to see?

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In a single iteration of the prisoner's dilemma, rational players are expected to defect to ensure they do not end up with the worst possible outcome for themselves, making mutual cooperation unlikely. This is because the temptation to defect and potentially receive a lighter sentence (assuming the other prisoner cooperates) outweighs the benefit of mutual cooperation, given that there is no future interaction to encourage cooperation through the possibility of retaliation or reward.

If the Prisoner's Dilemma Game Is Played Only Once, What