Editing Openai/6897769e-4ee4-800f-aba5-69cca34f701c (section)

==== In special relativity and wave mechanics, the speed of causal propagation is c, because: ====
* ccc is the slope of the light cone in spacetime.
* Physical influences (signals, photons, disturbances in the field) move along those lightlike cones.
* A velocity has units of distance/time; c2c^2c2 would have units of (distance²)/(time²), which isn’t a velocity but an energy per mass scale.

So in orthodox physics, nothing literally moves at c2c^2c2. Instead, c2c^2c2 appears in energy relations (e.g. E=mc2E = mc^2E=mc2) or as a conversion factor between space-like and time-like quantities.