 In another example involving Mach figures (discussed in  Section 4.2),  one focuses on a single four-sided equilateral figure, and contrasts the experience of seeing it as a square and seeing it as a diamond. The experiences supposedly differ phenomenally. According to Peacocke, there can be no difference in the scenario content of these experiences, because they represent the space around the perceiver as filled in in the same way. Rather, according to Peacocke, the difference is in the way in which the very same shape property is represented in experience. The central claim in support of this view is that the properties represented do not differ. In his (2001a) Peacocke offers two other examples in support of this claim. First, there are supposedly two ways of hearing the interval that sounds when middle C and F-sharp just above it are played on a piano: one and the same interval, he says, can be heard as an augmented fourth, or as a diminished fifth. Second, a matrix of evenly spaced dots can be seen as a set of rows or a set of columns.