The no communication theorem is not the no communication hypothesis, it's actually a math proof. You start from the principles of quantum mechanics (unitarity,

The no communication theorem is not the no communication hypothesis, it's actually a math proof. You start from the principles of quantum mechanics (unitarity, etc), define what you mean by entanglement (non-factoring states), and prove it's not possible to use those states to win the communication game. This is an aspect of quantum mechanics that we understand extremely well.