Abstract

A central task in understanding the theme of the posthuman involves relating it to the concept of the human. For some; there is continuity between the concepts of the human and the posthuman. This approach can be understood in the tradition of the great chain of being. Another approach posits a conceptual; and perhaps ontological; saltus. Here; the concept of the posthuman is taken to represent a radical departure from the realm of the human. After considering Lovejoy’s scheme of the great chain of being; Aristotle’s view of a conceptual saltus ; and their historical significance; I will suggest how we might distinguish various concepts of the posthuman from the human by applying Rudolf Carnap’s approach to defining multiple concepts of space. We can thus create a linguistic convention that will assist in constructing useful conceptions of the human and posthuman – these can clarify the prospects of a posthuman future.