  For Aristotle, it is not a contingent state of affairs that S’s mind does not realize the form being a tree frog in the way that tree frogs themselves do. On the contrary, the mind cannot realize a broad range of forms: the mind is, according to Aristotle, not “mixed with the body”, insofar as it, unlike the perceptual faculty, lacks a bodily organ (De Anima iii 4, 429a24–7). As such, it would not be possible for the mind to realize the form of a house in the way bricks and mortar instantiate such a form: houses provide shelter, something a mind, so understood, cannot do. Consequently, when claiming that minds become isomorphic with their objects, Aristotle must understand the way in which minds become enformed as somehow attenuated or non-literal. Perhaps, though, this should be plain enough. If a mind thinks something by being made like it, then the way it is likened to what it thinks must be somehow representational. Consequently, Aristotle is reasonably understood as holding that S thinks some object of thought O whenever S’s mind is made like that object by representing salient structural features of O by being directly isomorphic with them, without, that is, by simply realizing the form of O in the way O does.