Intractability Explains Physical Laws

The piece argues computational hardness is not just a practical limit but can itself explain physical reality. If classical simulation of quantum systems is exponentially hard, that supports many‑worlds; if time travel or nonlinear quantum mechanics grant absurd computation, that disfavors them; and some effective laws (e.g., black‑hole firewall resolutions, even the Second Law) may hold because violating them is computationally infeasible. This reframes which theories are plausible by adding a computational‑constraint layer to physical explanation. — It pushes physics and philosophy to treat computational limits as a principled filter on theories, influencing how we judge interpretations and speculative proposals.