> It demonstrates the ".. is a .." relationship that inheritance describes perfectly. It's rather imperfect, see the http://en.wikipedia.org/wiki/Circle-ellips

> It demonstrates the ".. is a .." relationship that inheritance describes perfectly. It's rather imperfect, see the http://en.wikipedia.org/wiki/Circle-ellipse_problem http://en.wikipedia.org/wiki/Circle-ellipse_problem for caveats.