國立臺灣大學哲學論評

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　　Most contemporary philosophers believe that things in the world can be exhaustively and exclusively divided into two categories: abstract objects and concrete ones, and a main “problem” about this division is where exactly the line between these two categories should be drawn? Hoffman and Rosenkrantz (2003) argued that every ordinary distinction between these two categories was subject to some serious problems and counterexamples, and they therefore proposed a novel distinction that they believed to be completely unproblematic. This paper argues against their proposal by appealing to the same strategy and criterion that they set up for other proposals. This paper also argues for two other points. First, it argues that the fundamental reason why it is so hard (even impossible) to find “the right” distinction between abstract and concrete objects is that philosophers’ “intuition” about the distinction is nothing but the result of conflation and confusion of several non-equivalent and/or vague distinctions. Second, it argues that the problem of the distinction between abstract and concrete objects is of no philosophical significance; it is, therefore, a pseudo problem that need not be investigated at all.