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Signal nonlocality means that quantum entanglement can be used as a communication channel without needing an auxilliary classical signal to unlock the message from the receiver that is stored nonlocally in the entanglement from encoding by the sender. This violates quantum theory, which demands that any local measurement of only one part of the entangled system must look like random noise without any coherent modulation envelope that carries the encoded message. Ordinary consciousness is not possible without signal nonlocality in my opinion. -- Jack Sarfatti