 Schelling contends that the identity of thought and being cannot be articulated within thought, because thought must presuppose that they are identical in a way which thought, as one side of a relation, cannot comprehend. By redefining the ‘concept’ in such a way that it is always already both subject and object, Hegel aims to avoid any presuppositions on either the subject or the object side, allowing the system to complete itself as the ‘self-determination of the concept’. Schelling presents the basic alternative as follows: