•  25
    Expressivism and Alternative Normative Concepts
    Studia Universitatis Babeş-Bolyai Philosophia 7-23. forthcoming.
    In recent work – primarily the book Choosing Normative Concepts (2017) – I has presented what I see as a new, significant problem regarding normativity. Briefly, it has to do with the existence of alternative normative concepts. What if I know that I ought to φ, but at the same time I know that I ought* to ψ, where ψ is an incompatible course of action and the concept OUGHT* is an alternative OUGHT-like concept? I think that this kind of question raises many different issues. But one thing it do…Read more
  •  19
    Variance Theses in Ontology and Metaethics
    In Alexis Burgess, Herman Cappelen & David Plunkett (eds.), Conceptual Engineering and Conceptual Ethics, Oxford University Press. pp. 187-204. 2019.
    The chapter illustrates conceptual engineering by bringing up a number of issues in metaontology and metaethics. A prominent debate in metaontology relates to whether some existence concept is metaphysically privileged. On the one hand, ontological realists say yes, and, on the other hand, friends of quantifier variance say no. The chapter brings up the corresponding question in metaethics by asking, is some rightness concept normatively privileged? It investigates this question, and compares th…Read more
  •  13
    Evaluative Language and Evaluative Reality
    In Simon Kirchin (ed.), Thick Concepts, Oxford University Press. pp. 161-181. 2013.
    This paper addresses the following two questions: (1) What it is for a _linguistic expression_ or a _concept_ to be evaluative (or normative)? (2) What it is for a _property_ or a _fact_ to be evaluative (or normative)? The most natural answers to these two questions are discussed, and serious problems with these answers are stressed. Important in the discussion is consideration of different kinds of evaluative concepts – thin concepts, thick concepts and epithets. No particular positive view is…Read more
  •  1
    Being Metaphysically Unsettled
    In Karen Bennett & Dean W. Zimmerman (eds.), Oxford Studies in Metaphysics volume 6, Oxford University Press. pp. 149-172. 2011.
    This chapter discusses the defence of metaphysical indeterminacy by Elizabeth Barnes and Robert Williams and discusses a classical and bivalent theory of such indeterminacy. Even if metaphysical indeterminacy arguably is intelligible, Barnes and Williams argue in favour of it being so and this faces important problems. As for classical logic and bivalence, the chapter problematizes what exactly is at issue in this debate. Can reality not be adequately described using different languages, some cl…Read more
  •  1
    Vagueness and Second‐Level Indeterminacy
    In Richard Dietz & Sebastiano Moruzzi (eds.), Cuts and clouds: vagueness, its nature, and its logic, Oxford University Press. pp. 63-76. 2010.
    Many theorists of vagueness take vagueness to be bound up with indeterminacy in a way that conflicts with classical logic and bivalence. Others, epistemicists like Timothy Williamson, hold that the only indeterminacy bound up with vagueness is epistemic — vagueness is just bound up with a certain kind of ignorance — and that vagueness does not conflict with classical logic and bivalence. Both types of view face well-known problems. This chapter presents a view on vagueness that sidesteps them. L…Read more
  • Carnap and Ontological Pluralism
    In David Chalmers, David Manley & Ryan Wasserman (eds.), Metametaphysics: New Essays on the Foundations of Ontology, Oxford University Press. 2009.
  • Vagueness and Second-Level Indeterminacy
    In Richard Dietz & Sebastiano Moruzzi (eds.), Cuts and clouds: vagueness, its nature, and its logic, Oxford University Press. 2010.
  • Fictionalism
    Stanford Encyclopedia of Philosophy. 2007.
  •  41
    Ontology and Top-Down Metasemantics
    In Xavier de Donato-Rodríguez, José L. Falguera & Concha Martínez-Vidal (eds.), Deflationist Conceptions of Abstract Objects, Springer Nature Switzerland. pp. 269-287. 2025.
    In this paper, I explore the implications for ontology of what Jared Warren has dubbed a top-down approach to metasemantics, explaining semantic features of subsentential expressions in terms of semantic features of whole sentences. Among authors who have adopted such an approach to metasemantics are Gottlob Frege, Michael Dummett, Crispin Wright, Donald Davidson, W.V.O. Quine, Agustín Rayo, Oystein Linnebo, and Warren himself, and many of these authors have also taken this top-down approach to …Read more
  •  12
    Carnap, Language Pluralism, and Rationality
    In Darren Bradley (ed.), Philosophical Methodology After Carnap, Springer. pp. 51-67. 2025.
    In this paper, I discuss what the consequences are of Carnap’s emphasis on frameworks, and on the distinction between internal and external questions, for questions about logic and rationality. Central to the discussion is a distinction between different interpretations of the talk of frameworks. I defend my interpretation of Carnap as what I call a language pluralist from recent criticisms. I further criticize recent work by Florian Steinberger, and argue that a puzzle which Steinberger thinks …Read more
  •  48
    Conceptual engineering, motivated one natural way, involves the search for new concepts. But to what extent does conceptual engineering as practiced involve such conceptual innovation, and to what extent can it do so? In this paper, I first argue that conceptual engineering as practiced surprisingly does not appear to involve conceptual innovation, and then I discuss problems regarding the extent to which it can involve conceptual innovation.
  • Vagueness and Second-Level Indeterminacy
    In Richard Dietz & Sebastiano Moruzzi (eds.), Cuts and clouds: vagueness, its nature, and its logic, Oxford University Press. 2010.
  •  7
    Inconsistent Languages
    Philosophy and Phenomenological Research 64 (2): 251-275. 2007.
    The main thesis of this paper is that we sometimes are disposed to accept false and even jointly inconsistent claims by virtue of our semantic competence, and that this comes to light in the sorites and liar paradoxes. Among the subsidiary theses are that this is an important source of indeterminacy in both conditions, that we must revise basic assumptions about semantic competence, and that classical logic and bivalence can be upheld in the face of the sorites paradox.
  •  10
    Realism and Antirealism (review)
    Dialogue 44 (4): 786-788. 2005.
  •  15
    Regress, unity, facts, and propositions
    Synthese 196 (4): 1225-1247. 2016.
    The problem, or cluster of problems, of the unity of the proposition, along with the cluster of problems that tend to go under the name of Bradley’s regress, has recently again become a going concern for philosophers, after having for some time been regarded as primarily of historical interest. In this paper, I distinguish between the different problems that tend to be brought up under the heading of the unity of the proposition, and between different related regress arguments. I present my favo…Read more
  •  552
    In my book Alien Structure: Language and Reality (OUP, 2024) I discuss the possibility of what I call alien languages and alien metaphysical structure. An alien language is a language with alien semantic structure. It is semantically different from familiar languages, in a broadly structural way, and through having kinds of resources not found in familiar languages. The world has alien metaphysical structure if its structure is best represented by an alien language. Here I illustrate what is at …Read more
  •  82
    Alien Structure: Language and Reality
    Oxford University Press. 2024.
    Philosophers have defended many different views on what reality is like. But despite their differences, the views share the same basic structure. The world is basically a world of objects, having properties and standing in relations. This structure mirrors the structure of basic sentences of the languages we use. But what other kinds of languages can there be? And might the world be such that another kind of language best represents it? That is, can there be alien languages and alien metaphysica…Read more
  •  188
    Conceptual engineering and conceptual innovation
    Inquiry: An Interdisciplinary Journal of Philosophy. forthcoming.
    Conceptual engineering, motivated one natural way, involves the search for new concepts. But to what extent does conceptual engineering as practiced involve such conceptual innovation, and to what extent can it do so? In this paper, I first argue that conceptual engineering as practiced surprisingly does not appear to involve conceptual innovation, and then I discuss problems regarding the extent to which it can involve conceptual innovation.
  •  187
    Replies to Festschrift Contributors
    Festschrift for Matti Eklund. 2024.
    In Andreas Stokke (ed.), Festschrift for Matti Eklund, 2024. Replies to Katharina Felka and Nils Franzén, Eli Hirsch, Dan Korman, David Liebesman, Øystein Linnebo, Anna-Sofia Maurin and Debbie Roberts. Topics discussed concern metaethics, metaphysics and philosophy of language. More specifically, issues discussed are thick concepts (Felka and Franzén; Roberts), ontology (Hirsch, Linnebo), indifferentism and fictionalism (Korman), alien languages and alien metaphysics (Liebesman), and Bradley's r…Read more
  • Normative properties
    In A. R. J. Fisher & Anna-Sofia Maurin (eds.), The Routledge Handbook of Properties, Routledge. 2024.
  •  22
    There is a vexed question in the literature on Marx of whether Marx was somehow anti-morality or if on the contrary he was instead defending a particular, perhaps rather radical, conception of morality. This question will be my starting point. But I will have nothing to contribute to the scholarly question of what Marx’s view was. Rather my aim will be this. Whatever in the end is the correct interpretation of Marx, it is undeniable that there are passages in Marx which if taken literally and st…Read more
  •  33
    (For colloquium talk in Aarhus, Denmark.).
  •  43
    I elaborate and defend the inconsistency view on vagueness I have earlier argued for in my (2002) and (forthcoming). In rough outline, the view is that the sorites paradox arises because tolerance principles, despite their inconsistency, are meaning-constitutive for vague expressions. Toward the end of the paper I discuss other inconsistency views on vagueness that have been proposed, and compare them to the view I favor.
  •  106
    In contemporary debates about ontology, one prominent skeptical view emphasizes the existence of different possible languages for doing ontology. Eli Hirsch, in recent years the most prominent proponent of a view like this, has defended the claim that “many familiar questions about the ontology of physical objects are merely verbal. Nothing is substantively at stake in these questions beyond the correct use of language” and the claim that “quantifier expressions can have different meaning in dif…Read more
  •  1623
    Alien Structure and Themes from Analytic Philosophy
    Giornale di Metafisica 41 (1): 195-208. 2019.
    We think of the world as consisting of objects, with properties and standing in relations. There are, to be sure, different views on what objects etc. there are, and on what their natures are. And some theorists want to subtract some elements from this picture. For example, the ontological nihilist says that there are no objects. But still, the view described is very much orthodoxy—so much orthodoxy that one may need to be reminded that the view that the world consists of objects, with propertie…Read more
  •  1018
    Forthcoming in Darren Bradley (ed.), Carnap and Contemporary Philosophy. This paper is centered on Carnap’s views on rationality. More specifically, much of the focus is on a puzzle regarding Carnap’s view on rationality that Florian Steinberger has recently discussed. Not only is Steinberger’s discussion of significant intrinsic interest: his discussion also raises general questions about Carnap interpretation. As I have discussed in earlier work, there are two very different ways of interpreti…Read more
  •  1219
    In this paper, I focus on AIs as very different, or at least potentially very different, kinds of language users from what humans are. Is the metasemantics for AI language use different, in the way Cappelen and Dever argue? Is it reasonable to think that AIs will come to use languages importantly different from human languages, what I call alien languages?
  •  213
    Schmoughts for Naught? Reply to Vermaire
    Journal of Philosophy 120 (7): 392-398. 2023.
    In his article "Against Schmought" (The Journal of Philosophy, CXVIII 2021), Matthew Vermaire discusses the central problems I focus on in my book Choosing Normative Concepts (2017). Vermaire defends an attempted solution, or dissolution, of these problems. While there is much in Vermaire’s discussion to admire, I do not think Vermaire’s solution works, and here I explain why. Key to my response is the distinction between employing a concept and reasoning about the concept.