An encyclopedia entry which covers various revisionary conceptions of which macroscopic objects there are, and the puzzles and arguments that motivate these conceptions: sorites arguments, the argument from vagueness, the puzzles of material constitution, arguments against indeterminate identity, arguments from arbitrariness, debunking arguments, the overdetermination argument, and the problem of the many.

More laws obtain in the world,it appears, than just those of microphysics –e.g. laws of genetics, perceptual psychology,economics. This paper assumes there indeedare laws in the special sciences, and notjust scrambled versions of microphysical laws. Yet the objects which obey them are composedwholly of microparticles. How can themicroparticles in such an object lawfully domore than what is required of them by the lawsof microphysics? Are there additional laws formicroparticles – which seems to violate closureof microphysics – or is the ``more'' (...) acoincidental outcome of microphysics itself? This paper argues that the appearance ofviolation is illusory, and the worry aboutcoincidence misleading. We cannot expect tounderstand the special sciences at the level ofthe microparticles. (shrink)

James decides that the best price today on pork chops is at Supermarket S, then James makes driving motions for twenty minutes, then James’ car enters the parking lot at Supermarket S. Common sense supposes that the stages in this sequence may be causally connected, and that the pattern is commonplace: James’ belief (together with his desire for pork chops) causes bodily behavior, and the behavior causes a change in James’ whereabouts. Anyone committed to the idea that beliefs and desires (...) are states installed by evolution must, it seems, think something similar. For how can one see beliefs and desires as conferring selective advantage if not by supposing that, by causing bodily behavior in their subjects, they brought about changes in their subjects’ surroundings? Yet many, many philosophers currently think or worry that mental causation is illusory (see, e.g., Heil and Mele 1993, or Macdonald and Macdonald 1995). Any physical changes which a mental state appears to cause can be viewed as a complex event involving microparticles, and for any such complex event, many philosophers suppose, there will have been previous microphysical occurrences sufficient to cause it. Barring routine overdetermination of such complex events, the apparent causation of mental events seems to be excluded. Nor does it help to say that some salient segment of the previous microphysical event just is the mental event, differently described (Davidson 1970). For describing the previous events as microphysical seems to spotlight the very features in virtue of which they did their causal work; the mental features seem epiphenomenal (Yablo 1992b: pp. 425-36; Yablo 1992a). This paper argues that the complex physical events, which mental events seem excluded from causing, are not caused at all. For they are either accidents, in something like Aristotle’s sense (Sorabji 1980: pp. 3-25), or coincidences, in a sense which David Owens has recently sharpened (Owens 1992). (shrink)