Eternal Recurrence, the Identity of Indiscernibles, and “Recurrence Awareness”

Abstract The doctrine of eternal recurrence (ER), understood as a cosmological theory, violates the principle of the identity of indiscernibles (PII): if cycles of events are supposed to recur qualitatively identically, then there is actually only one cycle. Given Nietzsche’s views about logical principles, this conflict may not be too worrisome—were it not for the fact that he does seem to apply the principle within cycles. This article suggests that this apparent conflict can be reconciled by applying a weakened version of PII that has been proposed on independent grounds in more recent philosophy. It allows for the possibility of qualitatively identical but numerically distinct events by employing a special kind of (“weakly discerning”) relations. It turns out that Paul Loeb’s proposal of relations of “recurrence awareness” between cycles is of the kind required by the weakened PII and thus serves to reconcile ER with the principle.