 Bill Brewer (2011) agrees with Campbell that a third relatum is needed in naïve realist accounts of perceptual experience, where the third relatum includes the sense modality of the experience, the spatio-temporal point of view, and other relevant circumstances of perception but he does not specify what exactly these circumstances are. William Fish (2009) takes a similar position, arguing that the third element should include idiosyncracies of the perceiver’s visual system as well as attentional facts about the perceiver since two ordinary perceivers viewing the same object from the same position may nonetheless differ in the character of their visual experiences, depending upon how good their eyesight is (for example) and how they distribute their attention.