Models of how the world works are based on causality, given certain conditions certain results follow according to a given pattern. Nothing in subjective reality corresponds to this the closest approximation being stimulus-response according to association of ideas - all that Hume could see as underpinning 'causality' - but even that is not fully subjective. What we experience is the response, but this only in the form of a disposition, more or less strong, or monopolising attention, or driven by addiction, without any absolute compulsion to act, that is varieties of will. The only moves that are subjectively acknowledged are logical and change of context. These are mediated by self-certainty, that is, by something in the core of the self that is revealed or disclosed. This movement is teleological in that it is ruled by the force of the outcome.