> Physics, chemistry, astronomy, geology study matter and energy;
> hard sciences. Sociology, cultural anthropology, economics,
> political science study the aggregate habits of interacting people;
> soft science.
"Economics" is misplaced here; while its application to human behavior might be "soft", the science itself is a branch of mathematics no less hard than Physics. In fact moreso; mathematical facts are true by definition and tautology--physical law is merely assumption by lack of counterexample (we've never seen conservation of mass-energy violated, so we call it a "law").
-- Lee Daniel Crocker <email@example.com> <http://www.piclab.com/lcrocker.html> "All inventions or works of authorship original to me, herein and past, are placed irrevocably in the public domain, and may be used or modified for any purpose, without permission, attribution, or notification."--LDC