These hard, non-negotiable limits are to me like system parameters:
- The Planck length, below which space loses meaning
- The Planck time, shortest measurable unit of time
- Speed of light, an upper bound on information transfer
- Absolute zero, a theoretical floor of thermodynamic activity
All of these are conceptually similar to float limits or system constraints you'd find in a simulation to keep the physics from spiraling into instability or undefined behavior (e.g., divide by zero errors, infinite recursion, etc.). In a true analog universe, one might expect gradual tapering or infinite variability. But in ours, reality appears pixelated at the smallest scales — a red flag that we’re in a quantized (or discretely simulated) environment.
A few more reasons to believe in the simulation hypothesis, by far my favorite theory to explain the Universe.