 RES-1,  however, faces an obvious problem (Goldman 2006). The resemblance relation is symmetric: for any x and y, if x resembles y, then y resembles x. Accordingly, it follows from  RES-1  that Lisa’s visual experience is a mental simulation of my visual imagery. But this is clearly wrong. There is no sense in which one person’s perceptual experience can be a mental simulation of another person’s mental imagery (see Ramsey 2010 for other difficulties with  RES-1).