 visually relevant similarities are those that ground and explain the ways that the particular physical objects that we are acquainted with in perception look. That is to say, visually relevant similarities are similarities by the lights of visual processing of various kinds... very crudely, visually relevant similarities are identities in such things as the way in which light is reflected and transmitted from the objects in question, and the way in which the stimuli are handled by the visual system, given its evolutionary history and our shared training during development (2011: 103)... in a case of visual illusion in which a mind-independent physical object, o, looks F, although o is not actually F, o is the direct object of visual perception from a spatiotemporal point of view and in circumstances of perception relative to which o has visually relevant similarities with paradigm exemplars of F although it is not actually an instance of F (2011: 105).