We showed in a recent article (Lawrence et al. 2023. Quantum, 7, 1015), that relative facts (outcomes), a central concept in Relational Quantum Mechanics, are inconsistent with Quantum Mechanics. We proved this by constructing a Wigner-Friend type sequential measurement scenario on a Greenberger-Horne-Zeilinger (GHZ) state of three qubits, and making the following assumption: “if an interpretation of quantum theory introduces some conceptualization of outcomes of a measurement, then probabilities of these outcomes must follow the quantum predictions as given by the Born rule.” Our work has been criticized by Cavalcanti et al. (2023. European Journal for Philosophy of Science, 13(4),55). In this note we show that their critique, based on their own reformulation of our argument, does not apply to our paper. It also raises questions of principle which are not answered within the framework of Relational Quantum Mechanics.

我们在最近的一篇文章中展示了（Lawrence 等人，2023 年。Quantum， 7， 1015），相对事实（结果）是关系量子力学中的一个中心概念，与量子力学不一致。我们通过在三个量子比特的 Greenberger-Horne-Zeilinger （GHZ） 状态上构建 Wigner-Friend 类型顺序测量场景来证明这一点，并做出以下假设：“如果对量子理论的解释引入了测量结果的一些概念化，那么这些结果的概率必须遵循 Born 规则给出的量子预测。我们的工作受到了 Cavalcanti 等人的批评（2023 年。欧洲科学哲学杂志，13（4），55）。在这篇笔记中，我们表明他们的批评，基于他们自己对我们论点的重新表述，并不适用于我们的论文。它还提出了在关系量子力学框架内无法回答的原则问题。