Isn't the measurement enough to change the quantum state of the system? What is "got told" in this experiment? Does it involve creating an entangled state? In

Isn't the measurement enough to change the quantum state of the system? What is "got told" in this experiment? Does it involve creating an entangled state? In which way? Otherwise, the story is classical information, which means a measurement must have been done or said story is not tied to quantum state at all. The whole idea sounds like making classical guesses is supposed to somehow affect quantum states in a predictable or any way.