Hallucination as Mental Imagery

Hallucination is a big deal in contemporary philosophy of perception. The main reason for this is that the way hallucination is treated marks an important stance in one of the most hotly contested debates in this subdiscipline: the debate between 'relationalists' and 'representationalists'. I argue that if we take hallucinations to be a form of mental imagery (as the literature in neuroscience and psychiatry routinely does), then we have a very straightforward way of arguing against disjunctivism: if hallucination is a form of mental imagery and if mental imagery and perception have some substantive common denominator, then a fortiori, perception and hallucination will also have a substantive common denominator.