Will [see just above] obviously has one of those 'built-in alarms'. When I was a young pre-retirement workingman, I never needed an alarm clock. I had the knock of just saying to myself as I lay down: 7 o'clock or 9 o'clock, depending on the next morning's being a working day or weekend or whatever, and would invariably wake at the time I had said to myself. I wonder if this ability has a name, or if any work has been done on this phenomenon?

≈M≈