I often hear in physics videos light speed is the ultimate speedlimit two parts of the universe can communicate at, or even that speed of light is actual speed of causality.
Where does that notion come from and where do physicists get the confidence to say that when they don't have a complete theory of all forces . Signals can in theory be sent through wormholes or warp drives faster than light would carry the , I'm not saying warp drives exist I am saying they exist in theory, thus it is one exaplee how there can be faster than light communication, so what exactly does in physics forbid faster than light communication? What evidence is there( theoretical or physical of impossibility of the above)
My point is how does all thus relate to general questions of quantum mechanics and censorship conjectures. People are always quick to point out intengelment doesnt deliver info since info can't be delivered faster than light but this is just a presumption not a fact right?