&gt; causality is still a strong axiom<p>The &quot;causality axiom&quot; is a nice (or trivial) statement in philosophy. But as far as we know, there&#x27;s no such axiom in any mathematical theory proved to match physical reality, and nothing so clear cut in modern theoretical physics at all afaik...<p>Also, physics isn&#x27;t that much built on axioms, in general: <a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=YaUlqXRPMmY" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=YaUlqXRPMmY</a> (Summarizing Feynman: you still get from time to time cases where you can prove something from &quot;axioms&quot;, but then you also find it to still hold in contexts where the axioms don&#x27;t apply, or even to not work in others where they do apply... and the latter is the case where you have to remake your theory to match <i>reality</i>)<p><i>But my main point is that considering something impossible simply because our puny ape brains can&#x27;t fathom them is preposterous!</i>