 Further, it is not at all clear that perspectivalism can account for the perception of time order. The mechanism suggested by Mellor (see  Time Order)  exploited the asymmetry of causation: it is the fact that the perception of A causally influences the perception of B, but not vice versa, that gives rise to the perception of A’s being followed by B. We can represent this schematically as follows (where the arrow stands for an asymmetric causal relation):