Saying Goodbye

I said goodby to a very honorable and kind old man last night. Actually, I just said goodnight, becuase I didn't want to eliminate the possibility that he might get through this, but it will serve if it really is goodbye. People were telling me that even though he was in a morphine-enduced sleep he could still hear me. I really want to find out if that is true, or if they were just saying that for my benefit and he really was just sound asleep. I mean, I'm really glad that they said that becuase it did make me feel better thinking that I could say "goodnight" even though he looked fast asleep. But now my scientific mind won't leave it at that. I don't hear things in my sleep, do you?