> Understanding something really deeply is connected to our physical intuition This rings true to me. I think that I "understand" how to start a fire, which I

> Understanding something really deeply is connected to our physical intuition This rings true to me. I think that I "understand" how to start a fire, which I do a couple dozen times a year, in a deeper more complete way than I understand any of the abstract software development that I spend 30 hours a week doing.