I remember that class particularly because as a brash and arrogant freshman I came into it one day and announced, "I've figured it out. You and all of you and the world I see sound me are all figures of my imagination. None of it is real." The class was shocked into silence at my outburst, because Brother Edmund was a crotchety old guy and reputed to be a hard grader. He was quiet for a moment, then he said, "Well, Mr ____, you may be right. What are you going to do about it?" When the meaning of what he said struck me, all I could do was laugh out loud. Brother Edmund just smiled and went on with the class as usual. I reread the Heisenburg book the other day as pertinent to some of your and Philo's comments. The other text was The Aim and Strcture of Physical Theory by Pierre Duhem which it appears I have lost, but I recommend it as well.