 At this point it is important to note that Mill’s science of reasoning really is, in both subject matter and methodology, a psychological discipline. Although the subject matter of the science of reasoning is more specific than that of psychology in general — the former investigates ‘the operations of the human understanding in the pursuit of truth’ (1843, 6) — there are, as Mill sees it, no special psychological laws characteristic exclusively of the domain of the science of reasoning. Instead, ‘the general laws of association prevail among these more intricate states of mind’ (1843, 856). Moreover, in both the general and the more specific domain, the discovery of laws is due to ‘the ordinary methods of experimental inquiry’ (1843, 853).