Frauchiger and Renner (2018) argue that no ‘single-world’ theory can consistently maintain quantum mechanical predictions for all systems. Following Bub (2017, 2018, 2019), I argue here that this is overstated, and use their result to develop a framework for neo-Copenhagen theories that avoid the problem. To describe the framework I introduce two concepts, ontological information deficits, and information frames, and explore how these may ultimately be fleshed out by the theorist. I then consider some immediate worries that may be raised against the framework, and conclude by looking at how some existing theories may be seen to fit into it.

Frauchiger和Renner（2018）认为，没有任何``单一世界''理论能够始终如一地维护所有系统的量子力学预测。继Bub（2017、2018、2019）之后，我在这里认为这被夸大了，并利用他们的结果为避免这种问题的新哥本哈根理论开发了框架。为了描述框架，我介绍了两个概念，本体论信息缺陷和信息框架，并探讨了理论家最终如何充实它们。然后，我考虑可能对框架提出的一些直接担忧，并通过研究如何看待一些现有理论来得出结论。