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In that case, ontological absolute idealism may be a triviality, because whatever exists is a constituent of various Russellian propositions, and thereby counts as a concept. However, even conceptual philosophers who accept the Russellian view of propositions will distinguish conceptual structure, the structure characteristic of propositions, from other sorts of structure. For example, they will analyze the atomic proposition that this crystal is translucent as the object-property complex )this crystal, translucency*, but they will not regard it as any of their business to analyze the structure of the crystal itself: that is chemical structure, not conceptual structure in the relevant sense, otherwise the proposition would not be atomic. Their goal for philosophy – to analyze the structure of thought – is still only to analyze one sort of structure among many. Thus one might accept the Russellian view of propositions and still oppose the conceptual turn, on the grounds that philosophy can appropriately investigate general features of nonconceptual structure too, such as the general mereological structure of physical objects.

Alternatively, take a more standard view of concepts, as something like modes of presentation, ways of thinking or speaking, or intellectual capacities. Still, the claim that concepts constitute only a small fraction of reality might be accused of violating Dummett’s second tenet by confusing thought with the process of thinking. Almost everyone agrees that psychological events constitute only a small fraction of reality, but that is not yet to concede that thought in a non-psychologistic sense is similarly confi ned. John McDowell (1994: 27), for instance, argues:³

[T]here is no ontological gap between the sort of thing one can mean, or generally the sort of thing one can think, and the sort of thing that can be the case. When one thinks truly, what one thinks is what is the case. So since the world is everything that is the case … there is no gap between thought, as such, and the world. Of course thought can be distanced from the world by being false, but there is no distance from the world implicit in the very idea of thought.

      For McDowell, the sort of thing one can think is a conceptual content: the conceptual has no outer boundary beyond which lies unconceptualized reality. He denies the accusation of idealism on the grounds that he is not committed to any contentious thesis of mind-dependence.

      The sort of thing that can be the case is that a certain object has a certain property. McDowell’s claim is not that the object and the property are concepts, but merely that we can in principle form concepts of them, with which to think that the object has the property. Indeed, we can in principle form many different concepts of them: we can think of the same object as Hesperus or as Phosphorus. In Fregean terms congenial to McDowell, different senses determine the same reference. He admits “an alignment of minds with the realm of sense, not with the realm of reference … thought and reality meet in the realm of sense” (1994: 179–80). For objects, his claim that the conceptual is unbounded amounts to the claim that any object can be thought of. Likewise for the sort of thing that can be the case: the claim is, for example, that whenever an object has a property, it can be thought, of the object and the property, that the former has the latter. But, on a coherent and natural reading of “the sort of thing that can be the case,” such things are individuated coarsely, by the objects, properties, and relations that they involve. Thus, since Hesperus is Phosphorus, what is the case if Hesperus is bright is what is the case if Phosphorus is bright: the objects are the same, as are the properties. On this reading, McDowell’s claim “When one thinks truly, what one thinks is what is the case” is false, because what one thinks is individuated at the level of sense while what is the case is individuated at the level of reference. Although McDowell’s claim is true on weaker readings, they will not bear the weight his argument puts on them.

McDowell’s argument in any case seems to require the premise that everything (object, property, relation, state of affairs, …) is thinkable. That premise is highly contentious. What reason have we to assume that reality does not contain elusive objects, incapable in principle of being individually thought of? Although we can think of them collectively – for example, as elusive objects – that is not to single out any one of them in thought. Can we be sure that ordinary material objects do not consist of clouds of elusive sub-sub-atomic particles? We might know them by their collective effects while unable to think of any single one of them. The general question whether there can be elusive objects looks like a good candidate for philosophical consideration. Of course, McDowell does not intend the conceptual to be limited by the merely medical limitations of human beings, but the elusiveness may run deeper than that: the nature of the objects may preclude the kind of separable causal interaction with complex beings that isolating them in thought would require. In Fregean terminology again, a sense is a mode of presentation of a referent; a mode of presentation of something is a way of presenting it to a possible thinker, if not an actual one; for all McDowell has shown, there may be necessary limitations on thinking. ⁴Although elusive objects belong to the same very general ontological category of objects as those we can single out, their possibility still undermines McDowell’s claim that we cannot make “interesting sense” of the idea of something outside the conceptual realm (1994: 105–6). We do not know whether there actually are elusive objects. What would motivate the claim that there are none, if not some form of idealism very far from McDowell’s intentions? We should adopt no conception of philosophy that on methodological grounds excludes elusive objects.⁵

Suppose, just for the sake of argument, that there are no elusive objects. That by itself would still not vindicate a restriction of philosophy to the conceptual, the realm of sense or thought. The practitioners of any discipline have thoughts and communicate them, but they are rarely studying those very thoughts: rather, they are studying what their thoughts are about. Most thoughts are not about thoughts. To make philosophy the study of thought is to insist that philosophers’ thoughts should be about thoughts. It is not obvious why philosophers should accept that restriction.

      Even within what is usually considered analytic philosophy of mind, much work violates the two tenets of conceptual philosophy. Naturalists hold that everything is part of the natural world, and should be studied as such; many of them study thought as part of the natural world by not sharply distinguishing it from the psychological process of thinking. Those who study sensations or qualia without treating them as intentional phenomena are not usually attempting to analyze the structure of thought; their interest is primarily in the nature of the sensations or qualia themselves, not in our concepts of them. Even when the question of veridicality arises, it is not always conceded that there are structured thoughts: some philosophers claim that perception has a conceptually unstructured content that represents the environment as being a certain way. Their interest is in the nature of the nonconceptual content itself, not just in our concept of it.

      Despite early hopes or fears, philosophy of mind has not come to play the organizing role in philosophy that philosophy of language once did. No single branch of philosophy does: philosophy is no more immune than other disciplines to increasing specialization. Nor is any one philosophical method currently treated as a panacea for philosophical ills, with consequent privileges for its home branch. Once we consider other branches of philosophy, we notice much more philosophizing whose primary subject matter is not conceptual.

      Biology and physics are not studies of thought. In their most theoretical reaches, they merge into the philosophy of biology and the philosophy of physics. Why then should philosophers of biology and philosophers of physics study only thought? Although they sometimes study what biologists’ and physicists’ concepts are or should be, sometimes they study what those concepts are concepts of, in an abstract and general manner. If the conceptual turn is incompatible with regarding such activities as legitimately philosophical, why take the conceptual turn?

There is a more central example. Much contemporary metaphysics is not primarily concerned with thought or language at all. Its goal is to discover what fundamental kinds of things there are and what properties and relations they have, not to study the structure of our thought about them – perhaps we have no thought about them until it is initiated by metaphysicians. Contemporary metaphysics studies substances and essences, universals and particulars, space and time, possibility and necessity. Although nominalist or conceptualist reductions of all these matters have been attempted, such theories

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