Dialectica

Metalinguistic Monstrosity and Displaced Communications

Graham Stevens — Thu, 31 Dec 2020 00:00:00 +0100

David Kaplan’s semantic theory for indexicals yields a distinct logic for indexical languages that generates contingent a priori truths. These special truths of the logic of indexicals include examples like “I am here now,” an utterance of which expresses a contingent state of affairs and yet which, according to Kaplan, cannot fail to be true when it is uttered. This claim is threatened by the problem of displaced communications: answerphone messages, for example, seem to facilitate true instances of the negation of this supposed logical truth as they allow the agent of the message to no longer be at the location of the message when it is encountered by an audience. Many such displaced communications can be identified in everyday natural language uses of indexicals. Recent discussion has suggested that Kaplan’s error is to be overly restrictive in the possible contexts of utterance his semantic theory recognizes, as he fails to acknowledge the possibility of utterances that occur at a context distinct from that in which they are constructed. I reject this diagnosis and defend Kaplan’s semantic theory. Displaced communications, I argue, are best understood as resulting from a pragmatically introduced metalinguistic context-shifting operation and hence do not demand revision of Kaplan’s semantic theory. I provide an analysis of the pragmatic process underlying this operation and make the case for its merits over those of rival accounts of displaced communications.

Constitutivism About Instrumental Desire and Introspective Belief

Ryan Cox — Thu, 31 Dec 2020 00:00:00 +0100

This essay is about two familiar theses in the philosophy of mind: constitutivism about instrumental desires, and constitutivism about introspective beliefs, and the arguments for and against them. Constitutivism about instrumental desire is the thesis that instrumental desires are at least partly constituted by the desires and means-end beliefs which explain them, and is a thesis which has been championed most prominently by Michael Smith. Constitutivism about introspective belief is the thesis that introspective beliefs are at least partly constituted by the mental states they are about, and is a thesis which has been championed most prominently by Sydney Shoemaker. Despite their similarities, the fortunes of these two theses could not be more opposed: constitutivism about instrumental desire is widely accepted, and constitutivism about introspective belief is widely rejected. Yet, the arguments for both theses are roughly analogous. This essay explores these arguments. I argue that the argument which is widely taken to be the best argument for constitutivism about instrumental desires—what I call the argument from necessitation—does not provide the support for the thesis it is widely taken to provide, and that it fails for much the same reasons that it fails to provide support for constitutivism about introspective belief. Furthermore, I argue that the best argument for constitutivism about instrumental desires—what I will call the argument from cognitive dynamics—is also a good argument, if not equally good, for constitutivism about introspective belief (at least when the thesis is suitably qualified).

The Mental States First Theory of Promising

Alida Liberman — Thu, 31 Dec 2020 00:00:00 +0100

Most theories of promising are insufficiently broad, for they ground promissory obligation in some external or contingent feature of the promise. In this paper, I introduce a new kind of theory. The Mental States First (MSF) theory grounds promissory obligation in something internal and essential: the mental state expressed by promising, or the state that promisors purport to be in. My defense of MSF relies on three claims. First, promising to Φ expresses that you have resolved to Φ. Second, resolving to Φ commits you to Φing, all else being equal. Third, the norms on speech acts are determined by the norms on the mental states they express, such that publicly expressing that you are in a state subjects you to whatever commitments are normally incurred by being in that state, regardless of whether you really are in it. I suggest that this general approach might also explain how the norms on other sorts of speech acts work.

A Puzzle About Parsimony

Peter Finocchiaro — Thu, 31 Dec 2020 00:00:00 +0100

In this paper, I argue for the instability of an increasingly popular position about how metaphysicians ought to regard parsimony. This instability is rooted in an unrecognized tension between two claims. First, we as metaphysicians ought to minimize the number of ontological kinds we posit. Second, it is not the case that we ought to minimize the number of ideological expressions we employ, especially when those expressions are of the same ideological kind (e.g., the compositional predicates ‘is a part of’ and ‘overlaps’). I argue that the two claims are in tension with one other. At the very least, minimizing the number of ontological kinds posited entails minimizing the number of expressions employed—more specifically, the “ontologically committing” predicates. But, plausibly, the tension runs deeper than that. I suggest that minimizing the number of ontological kinds just is a specific way of minimizing the number of ideological expressions employed in stating a theory. The two activities target the same aspect of reality, the world’s metaphysical structure. I end by evaluating three different responses to this puzzle. Ultimately, I suggest that metaphysicians should treat the minimization of the number of ideological expressions as more important than it currently is treated.

David Armstrong on the Metaphysics of Mathematics

Thomas Donaldson — Thu, 31 Dec 2020 00:00:00 +0100

This paper has two components. The first, longer component (sections 1–6) is a critical exposition of Armstrong’s views about the metaphysics of mathematics, as they are presented in Truth and Truthmakers and Sketch for a Systematic Metaphysics. In particular, I discuss Armstrong’s views about the nature of the cardinal numbers, and his account of how modal truths are made true. In the second component of the paper (section 7), which is shorter and more tentative, I sketch an alternative account of the metaphysics of mathematics. I suggest we insist that mathematical truths have physical truthmakers, without insisting that mathematical objects themselves are part of the physical world.