The aim of this paper is to reconstruct and correct one argument (known in the literature as the exchange degeneracy argument) in support of the symmetrization postulate in quantum mechanics. I identify the central premise of the argument as a thesis specifying a particular ontic (or epistemic) property of quantum superpositions. The precise form of this thesis depends on some underlying assumptions of a metaphysical character (concerning identifications of objects across possible worlds, or representations de re). I compare the exchange degeneracy argument with alternative formal arguments for the symmetrization postulate, and I discuss the role and meaning of labels in the symmetric/antisymmetric representations of the states of many particles.

本文的目的是重建和纠正一个论点（在文献中称为交换简并论点）以支持量子力学中的对称化假设。我将论证的中心前提确定为指定量子叠加的特定本体（或认知）属性的论文。这篇论文的精确形式取决于形而上学特征的一些基本假设（关于跨可能世界的对象的识别，或 de re 的表示）。我将交换简并论证与对称化假设的替代形式论证进行了比较，并讨论了标签在许多粒子状态的对称/反对称表示中的作用和意义。