Timothy Schroeder

The philosophy of mind encompasses a familiar set of topics: consciousness, intentionality, mental causation, emotion, whatever topics in psychology happen to capture our interest (concepts, mindreading . . .), and so on. There is a topic deserving of addition to this list, a topic that should be receiving regular attention from philosophers of mind but is not: practical rationality. The philosophy of mind bears directly upon what can be called the ‘meta-theory’ of practical rationality, and meta-theories of rationality likewise impose constraints on the philosophy of mind. Philosophers of mind who do not engage with work on practical rationality risk developing theories that are blind to important theoretical demands. They also risk allowing ethicists—who have been at work on the meta-theory of practical rationality—to unilaterally set their theoretical agendas. It is therefore time to get to work.

There are monsters that scare children and monsters that scare grownups, and then there are monsters that scare philosophers of mind. This paper is concerned with this third sort of monster, whose primary representative is the zombie—a living being, physically just like a person but lacking consciousness. Though zombies act like normal people and appear to have normal brains, everything is blank inside. Unfortunately, the term ‘zombie’ covers a narrower class of deficits than is convenient, failing to cover apparently normal human beings lacking propositional attitudes. Davidson’s “Swampman” is supposed to be an example of such a creature, so I will dub individuals who are apparently normal but lack all propositional attitudes ‘swampfolk,’ though this is non-standard terminology. In what follows, I will refer to both zombies and swampfolk as ‘monsters,’ and will similarly designate animals lacking in consciousness or propositional attitudes.

Donald Davidson's theory of mind is widely regarded as a normative theory. This is a something of a confusion. Once a distinction has been made between the categorisation scheme of a norm and the norm's force-maker, it becomes clear that a Davidsonian theory of mind is not a normative theory after all. Making clear the distinction, applying it to Davidson's theory of mind, and showing its significance are the main purposes of this paper. In the concluding paragraphs, a sketch is given of how a truly normative Davidsonian theory of mind might be formulated

Sometimes your concept and mine have exactly the same content. When this is so, it is comparatively easy for me to understand what you say when you deploy your concept, for us to disagree, agree, and so on. But what if your concept and mine do not have exactly the same content? This question has occupied a number of philosophers, including Paul Churchland, Jerry Fodor, and Ernie Lepore. This paper develops a novel and rigorous measure of concept similarity, Proportion, such that concepts with different contents but sufficiently high Proportion scores will also conduce to understanding, agreement, and disagreement.