Many people learn stuff when they go sailing. Others are able to learn stuff while while thinking and obsessing about sailing from the comfort of their offices.
Some people learn practical stuff like not to forget the gas tank or how to gybe properly. The ones that sit in their offices and obsess about sailing learn stuff that's theoretical like how many miles they will be from the Oceanic Pole of Inaccessibility at their nearest approach.
Edward is the second kind of person. His contribution to our Learning Experiences group writing project is Point Nemo. It's even more fascinating than the comments he left on this blog earlier this week about the mathematical properties of sums of sequences of consecutive squares.