Alex Rosenberg developed a theory of structural resemblance or physical isomorphism which could explain how neural states can instantiate truth within the correspondence theory of truth. Neuroscientists use the word “representation” to identify the neural circuits’ encoding of inputs from the peripheral nervous system in, for example, the visual cortex. However, neuroscientists use the word “representation” without according it any commitment to intentional content. In fact, there is an explicit commitment to describing neural representations in terms of structures of neural axonal discharges that are physically isomorphic to the inputs that cause them. Suppose that this way of understanding representation in the brain is preserved in the long-term course of research providing an understanding of how the brain processes and stores information. Then there will be considerable vindication for the brain as a neural network whose physical structure is identical to the aspects of its environment that it tracks and where its representations of these features consist in this physical isomorphism.