Okon Elias
Instituto de Investigaciones Filosóficas, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico.
Entropy (Basel). 2025 May 27;27(6):563. doi: 10.3390/e27060563.
Two recent, prominent theorems-the "no-go theorem for observer-independent facts" and the "Local Friendliness no-go theorem"-employ so-called extended Wigner's friend scenarios to try to impose novel, non-trivial constraints on the possible nature of physical reality. While the former is argued to entail that there can be no theory in which the results of Wigner and his friend can both be considered objective, the latter is said to place on reality stronger constraints than the Bell and Kochen-Specker theorems. Here, I conduct a thorough analysis of these theorems and show that they suffer from a list of shortcomings that question their validity and limit their strength. I conclude that the "no-go theorem for observer-independent facts" and the "Local Friendliness no-go theorem" fail to impose significant constraints on the nature of physical reality.
最近有两个著名的定理——“关于与观察者无关事实的不可行定理”和“局域友好性不可行定理”，它们运用所谓的扩展维格纳朋友场景，试图对物理实在的可能性质施加新颖且非平凡的限制。虽然前者被认为意味着不存在这样一种理论，其中维格纳及其朋友的结果都能被视为客观的，但后者据说对实在施加了比贝尔定理和科亨 - 施佩克尔定理更强的限制。在此，我对这些定理进行了全面分析，并表明它们存在一系列缺陷，这些缺陷质疑了它们的有效性并限制了它们的力度。我的结论是，“关于与观察者无关事实的不可行定理”和“局域友好性不可行定理”未能对物理实在的性质施加重大限制。
