I systematically defend a novel account of the grounds for identity and distinctness facts: they are all uniquely zero-grounded. First, this Null Account is shown to avoid a range of problems facing other accounts: a relation satisfying the Null Account would be an excellent candidate for being the identity relation. Second, a plenitudinist view of relations suggests that there is such a relation. To flesh out this plenitudinist view I sketch a novel framework for expressing real definitions, use this framework to give a definition of identity, and show how the central features of the identity relation can be deduced from this definition.

中文翻译：

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奠定和定义身份

我系统地捍卫了对身份和独特性事实的理由的新颖描述：它们都是独特的零基础。首先，这个空账户被证明可以避免其他账户面临的一系列问题：满足空账户的关系将是身份关系的绝佳候选者。其次，全会主义的关系观表明存在这样一种关系。为了充实这一全会主义观点，我勾画了一个表达真实定义的新颖框架，使用这个框架给出了身份的定义，并展示了如何从这个定义中推导出身份关系的核心特征。