We have tons of simplified examples of idealized theories with fixed points. The community at large has worked a lot on empty space-time, just pure gravity. Actually, most of us work in an even more simplified setting where there are only quantum fluctuations of space, rather than fluctuations of both space and time. But nevertheless, people have tested this in literally hundreds of papers and found very robustly that this fixed point where things stop changing exists.
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“我本人比较i（内向），面对新环境，会很慌。”张禾描述着入职前夜的心情。她在焦虑失眠中，下意识打开了短视频。。关于这个话题，手游提供了深入分析
Chad Whitacre Head of Open Source, Sentry
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