This dialogue concerns metasemantics and language cognition. It defends a Lewisian conception of languages as abstract entities (Lewis 1975), arguing that semantic facts are necessities (Soames 1984), and therefore not naturalistically reducible. It identifies spoken languages as idiolects, in line roughly with Chomskyan I-languages. It relocates traditional metasemantic indeterminacy arguments as indeterminacies of what language an agent speaks or cognizes. Finally, it aims to provide a theoretical analysis of the cognizing relation in terms of the agent's assigning certain meanings to strings.

Respect, as Kant describes it, has a duality of nature that seems to embody a contradiction – i.e., it is both a moral motive and a feeling, where these are thought to be mutually exclusive. Most solutions involve eliminating one of the two natures, but unfortunately, this also destroys what is unique about respect. So instead, I question the non-cognitive theory of emotion giving rise to the contradiction. In its place, I develop the cognitive theory implicit in Kant's work, one in which emotions take the form of evaluative judgments that determine the will. I then show that, as a purely rational emotion, respect is perfectly suited to be a moral motive.

There are five basic ways to resolve disagreements: keep arguing until capitulation, compromise, locate an ambiguity or contextual factors, accept Pyrrhonian skepticism, and adopt relativism. Relativism is perhaps the most radical and least popular solution to a disagreement, and its defenders generally think the best motivator for relativism is to be found in disputes over predicates of personal taste. I argue that taste predicates do not adequately motivate relativism over the other possible solutions, and argue that relativism looks like the most promising approach when disputants cannot even agree on the meta-evidence for a contested proposition.

Recent work on dispositions offers a new solution to the long-running dispute about whether explanations of intentional action are causal explanations. The dispute seemed intractable because of a lack of percipience about dispositions and a commitment to Humean orthodoxies about causation on both sides.

Karl Popper identified Xenophanes of Colophon (570–478 BCE) as the originator of the method of conjectures and refutations. This essay explores this claim, and the methods of both philosophers (section 1). Disparagement (ancient and modern) of Xenophanes has been misguided (section 2). Xenophanes, a critical rationalist and realist, pioneered philosophy of religion (section 3) and epistemology (section 4), but his method was not confined to falsificationism, and appears compatible with inductivism and abductionism (section 5). The method employed by Popper in interpreting Herodotus in support of his conjectures about Xenophanes is typical of the multiple-strand reasoning characteristic of the humanities, and is as much inductivist or abductionist as refutationist (section 6). Popper's theories about Xenophanes are convincing; but even if Popperians would claim that Popper's refutationism largely fits the natural sciences, his application of it to history is implausible, and conflicts with own practice (section 7). An appendix reflects on Popper's interest in cultured refugees.

In this essay I ague that the mainstream ‘Standard Story’ of action – according to which actions are bodily motions with the right internal mental states as their causal triggers (e.g., ‘belief-desire-pairs’, ‘intentions’) – gives rise to a deeply problematic conception of inter-subjective action-understanding. For the Standard Story, since motivating reasons are internal mental states and bodily motions are not intrinsically intentional, an observer must ascribe internal states to others to make rational sense of their outwardly observable bodily motions. I argue this is both phenomenologically distorted and requires, on pain of infinite regress, a deeper, non-inferential, practical-perceptual form of understanding: ‘knowledge-how’, in a broadly Rylean sense. Recognizing the irreducible role of practical-perceptual knowledge-how in inter-subjective understanding, I argue, undermines core assumptions of the Standard Story concerning what an agent can directly perceive in interacting with others, and how our everyday practices of explaining actions with reasons function – and this opens the space for a radically opposed alternative view of inter-subjective action understanding.