Replies to Comments on Ontology Made Easy

I'd like to begin by thanking Katherine Hawley, Daniel Korman and Stephen Schiffer for their extremely interesting and insightful comments, which very much enrich the discussion. I am both honored and grateful that such fine philosophers would spend their time and careful attention on my work. Since there doesn't seem to be significant overlap across their concerns, I will simply respond to each in turn.     

Introspection and phenomenological method

It is argued that the work of Husserl offers a model for self-knowledge that avoids the disadvantages of standard introspectionist accounts and of a Sellarsian view of the relation between our perceptual judgements and derived judgements about appearances. Self-knowledge is based on externally directed knowledge of the world that is then subjected to a cognitive transformation analogous to the move from a statement to the activity of stating. Appearance talk is (contra Sellars) not an epistemically non-committal form of speech, but talk to which we are fully committed. However, it is a commitment to a certain kind of claim about our experiences, viewed as cognitive phenomena, after a process of transformation. Such reductive and hypostatizing transformations can exhibit the intentional structure of consciousness. Phenomenology thus gives a form of knowledge about our mental states that is first personal but not introspective knowledge in any philosophically problematic sense. The account offered is also, in key respects, dissimilar to Sellars's outer directed view of the origin of self-knowledge.     

How can we come to know metaphysical modal truths?

Those who aim to give an account of modal knowledge face two challenges: the integration challenge of reconciling an account of what is involved in knowing modal truths with a plausible story about how we can come to know them, and the reliability challenge of giving a plausible account of how we could have evolved a reliable capacity to acquire modal knowledge. I argue that recent counterfactual and dispositional accounts of modal knowledge cannot solve these problems regarding specifically metaphysical modal truths—leaving us with the threat of skepticism about large portions of metaphysics, and certain other areas of philosophy. I argue, however, that both of these problems look insuperable only if we assume that metaphysical modal discourse serves a describing or tracking function. If we adopt instead a normativist approach to metaphysical modal discourse, which sees the basic function of modal discourse as giving us perspicuous ways of conveying, reasoning with, and renegotiating semantic rules, the problems show up very differently. The modal normativist can give a plausible response to both of the classic problems of how we can come to know metaphysical modal truths.

     

Norms and Necessity

Modality presents notorious philosophical problems, including the epistemic problem of how we could come to know modal facts and metaphysical problems about how to place modal facts in the natural world. These problems arise from thinking of modal claims as attempts to describe modal features of this world that explain what makes them true. Here I propose a different view of modal discourse in which talk about what is “metaphysically necessary” does not aim to describe modal features of the world, but, rather, provides a particularly useful way of expressing constitutive semantic and conceptual rules in the object language. The result is a “modal normativist” view that enables us to avoid the epistemic problems of modality and mitigate the metaphysical worries, while also leaving open the possibility of a unified account of the function of modal language. Finally, I address a serious challenge: we have the norms we do in order to track the modal facts of the world, so that the order of explanation must go in the opposite direction. I close by showing how the normativist may answer that challenge.     

METAPHYSICAL ARGUMENTS AGAINST ORDINARY OBJECTS

Several prominent attacks on the objects of 'folk ontology' argue that these would be omitted from a scientific ontology, or would be 'rivals' of scientific objects for their claims to be efficacious, occupy space, be composed of parts, or possess a range of other properties. I examine causal redundancy and over determination arguments, 'nothing over and above' appeals, and arguments based on problems with collocation and with property additivity. I argue that these share a common problem: applying conjunctive principles to cases in which the claims conjoined are not analytically independent. This unified diagnosis provides a way of defending ordinary objects against these common objections, while also yielding warnings about certain uses of general conjunctive principles.