Abstract

The paper demonstrates that the biological species concept that Mayr con- trasts with the typological one in fact presupposes a version of the typological species concept. For one cannot assess whether two living beings are capable of producing offspring without already knowing what would count as off- spring. Therefore, one must know non-relational features of typical offspring of a kind of living beings in order to be able to apply the biological species concept. The typological species concept that is at stake here is the Aristote- lian one.