On Mon, 28 Sep 2009 09:14:57 -0700 (PDT), Roger Long
wrote:

Several months ago, I made this statement during a discussion of
stability here. The minor flame war that resulted made it impractical
to defend the proposition and it wasn't much fun anyway.

Buoyancy may be imaginary but experience has demonstrated that it's
better to be on a boat with it than without.