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By Jon Young, Tiffany Morgan

Bargains professional guide and in-the-field recommendation for the beginner and skilled tracker.

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They can be combined in a variety of ways. Lycan, for example, advocates a vertical approach to explaining (what he calls) awareness, and a horizontal, representationist, approach to explaining phenomenal character. More generally, it may turn out that a vertical approach is able to handle some features of phenomenal consciousness while a horizontal strategy is able to handle the rest. Or it may not so turn out. In any event, the horizontal, representationist, account of phenomenal character will be examined in chapter 9.

Chalmers also sometimes develops the idea of supervenience in yet a third way. In a case of logical supervenience, subvenient facts entail the supervenient facts. In general, Chalmers claims, when F-properties supervene logically on G-properties, we can say that the G-facts entail the F-facts (1996: 36). We can call this the deducibility construal of logical supervenience. This may seem like another formulation of the epistemological interpretation. However, Chalmers defines entailment in terms of the idea of broad logical possibility: one fact entails another if it is logically impossible for the first to hold without the second.

Similarly, and more generally, it is plausible to suppose that macrophysical facts fail to supervene logically on microphysical facts when logical supervenience is understood in an epistemological sense. Thus, if one can (i) assert that two objects have the same microphysical properties, and (ii) deny that they share the same macrophysical properties, and, in so doing, (iii) exhibit only gross empirical ignorance rather than conceptual Consciousness and supervenience 41 confusion, then this is sufficient to show that macrophysical properties do not logically supervene on microphysical ones, where, to reiterate, this supervenience is understood epistemologically.

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