Frege's puzzle about identity sentences has long challenged many philosophers to find a solution to it but also led other philosophers to object that the evidential datum it is grounded on is false. The present work is an elaboration of this second kind of reaction: it explains why Frege's puzzle seems to resist the traditional objection, giving voice to different and more elaborated presentations of the evidential datum, faithful to the spirit but not to the letter of Frege's puzzle. The final outcome is negative, no satisfactory formulation of the evidential datum is found and Frege's puzzle is challenged until a better formulation of it is found.

中文翻译：

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信息身份：弗雷格谜题的挑战

长期以来，弗雷格关于恒等句的难题一直挑战着许多哲学家去寻找解决方案，但也导致其他哲学家反对它所依据的证据数据是错误的。目前的工作是对第二种反应的详细阐述：它解释了为什么弗雷格的谜题似乎抵制了传统的反对意见，为证据数据的不同和更详细的呈现提供了声音，忠实于弗雷格谜题的精神而不是文字. 最终结果是否定的，没有找到令人满意的证据数据表述，弗雷格的谜题受到挑战，直到找到更好的表述。