doesn't. (Hume 1974:340) 6. Of probability This short chapter begins with the notions of probability and chance. For him, "probability" means a higher chance of occurring, and brings about a higher degree of subjective expectation in the viewer. By "chance", he means all those particular comprehensible events which the viewer considers possible in accord with the viewer's experience. However, further experience takes these equal chances, and forces the imagination to observe that certain chances arise more frequently than others. These gentle forces upon the imagination cause the viewer to have strong beliefs in outcomes. This effect may be understood as another case of custom or habit taking past experience and using it to predict the future. (Hume 1974:346-348) 7. Of the idea of necessary connection (in two parts) By "necessary connection", Hume means the power or force which necessarily ties one idea to another. He rejects the notion that any sensible qualities are necessarily conjoined, since that would mean we could know something prior to experience. Unlike his predecessors, Berkeley and Locke, Hume rejects the idea that volitions or impulses of the will may be inferred to necessarily connect to the actions they produce by way of some sense of the power of the will. He reasons that, 1. if we knew the nature of this power, then the mind-body divide would seem totally unmysterious to us; 2. if we had immediate knowledge of this mysterious power, then we would be able to intuitively explain why it is that we can control some parts of our bodies (e.g., our hands or tongues), and not others (e.g., the liver or heart); 3. we have no immediate knowledge of the powers which allow an impulse of volition to create an action (e.g., of the "muscles, and nerves, and animal spirits" which are the immediate cause of an action). (Hume 1974:353-354) He produces like arguments against the notion that we have knowledge of these powers as they affect the mind alone. (Hume 1974:355-356) He also argues in brief against the idea that causes are mere occasions of the will of some god(s), a view associated with the philosopher Nicolas Malebranche. (Hume 1974:356-359) Having dispensed with these alternative explanations, he identifies the source of our knowledge of necessary connections as arising out of observation of constant conjunction of certain impressions across many instances. In this way, people know of necessity through rigorous custom or