Abstract

This article aims to examine the import of science to the contemporary philosophical debate on ontic vagueness. It is shown, first, that our best theory on the structure of mater, quantum mechanics, clearly ascribes vague properties to objects. This point is explained by both a general theoretical analysis and by some simple examples. The advantage of these examples over that which has been hotly discussed in the literature is underlined. Secondly, it is pointed out that stronger evidence for the existence of vague objects is available through a series of theoretical and experimental results in microphysics, imposing severe constraints on any theory purporting to restore sharpness in the properties of quantum objects