The article deals with the so-called problem of "aporia generis", that is, the paradoxical implications that result if "being" is regarded as a genus. The article shows that most of the formulations of the "aporia" in the history are defective; nevertheless, on certain assumption one can obtain a valid "aporetic" argument after all.
The required assumption is demasked as consisting in an unsubstantiated reduction of virtual (or weak) conceptual containment to formal (or strong) conceptual containment, and reasons are given why it should be rejected. The "Aporia generis" is thus solved without need to compromise the generic nature of the concept of being.