 The problem of the external world, especially the Indirectness Principle, sees its modern renaissance in Descartes’s representative realism, which was offered as an alternative to both the commonsense view of naive (aka direct) realism, and the hylomorphic theory standard among Scholastics. This latter doctrine holds that objects are combinations of primordial matter and forms impressed upon them, which determine the objects’ properties; these objects then cast off forms that can enter the mind through the sense organs. A red thing is simply something that has the form of RED, which it can transmit, making the receptive, perceiving mind also—though presumably in a different sense—red.