 A final possibility to envisage is that causation is neither self-causation nor causation from a distinct object. This is usually understood as the belief in the complete absence of causation since the first three alternatives are taken to be exhaustive: if these alternatives are ruled out the only remaining possibility is that there are no causal relata since there is no causal relation. A major difficulty with this view is that it fails to account for our ability to grasp facts about the world, since our epistemic access is most plausibly understood as causal. If there is no causal interaction between our sense-organs and the objects out there how is knowledge of the world possible at all? A further concern is the fact that the world appears to us to be causally ordered. It is not the case that more or less anything follows from anything else, but certain things only follow from certain other things. As such an account that denies the existence of causal relations altogether cannot be a satisfactory account of the world as we experience it.