That&#x27;s a super interesting point actually.  I&#x27;d never thought of the &quot;maxium speed of causality&quot;.  Thanks for sharing!<p>We could determine the maximum speed within our terms, but again that doesn&#x27;t necessarily translate to how things happen in the underlying substrate.<p>Thought experiment: let&#x27;s imagine we create our own simulated environment and put a sentient AI into it (which is implemented in the physics of that environment).  The AI gets curious and does some experiments and figures out the maximum speed that causality can propagate in it&#x27;s environment.  Suppose the speed of light in the simulation is as fast as the speed of light in our environment.  So something takes 1 in the simulation and 1 second in ours.  Cool.  Now, suppose you and I as the developers put in a &#x27;sleep&#x27; call into the event loop or whatever so that the simulation runs at 1&#x2F;10 the speed of real time.  Light in the simulation is now 10 times slower than it was by our clock time.  Now the code operates <i>considerably</i> slower - but any entity in the code wouldn&#x27;t perceive the slowdown because it has slowed down too in the same way.<p>Same thing - any slowdown in the simulation would not be noticeable to us because it&#x27;s also a slowdown in <i>us</i>.