Passage Summary: Researchers found that surgery patients who listened to music needed fewer drugs than those who listened to talking, so they concluded that being less stressed by the music makes you feel less pain.

Conclusion: Lowering a person's stress levels makes them less sensitive to physical pain.

Reasoning: In a study, surgery patients who listened to music tapes required less anesthesia and fewer painkillers than those who listened to conversation tapes.

Analysis: The researchers are assuming a causal link that hasn't been fully established: they assume the music actually reduced stress and that this specific reduction is what led to the lower medication needs. If the music did something else—like distracting the brain or releasing endorphins independent of stress—the conclusion falls apart. Look for an answer that confirms music actually lowered stress levels or that the two groups didn't have other major differences. We need a bridge between the music data and the stress conclusion.