 Sense-datum theorists have developed more positive Problem of Perception style reasoning to support these additional ideas. For instance, Macpherson (2013: 12–13) outlines a more complicated version of the argument from hallucination than that above which concludes that “All perceptual experience, hallucinatory and non-hallucinatory, involves awareness of a mind-dependent, nonphysical object—a sense-datum”. And some sense-datum theorists have attempted to support non-ordinary sense-data outside of the context of the Problem of Perception (see Jackson (1977) and Lowe (1992)).