RE: [math-fun] Hot & Cold

=Jon Perry A simple solution - use icons instead, e.g. a snowflake and a flame.

Good idea (except then we'll get sued for alien pornographic harassment...<;-) While we're at it we could score higher on the Martian intelligence test by universally adopting saner basis vectors for the control space in the first place--namely temperature and total water volume, rather than hot-volume and cold-volume. (But then again, as David Wilson notes, that's nowhere near as bad as turning on the windshield wipers by mistake when trying to parallel park a flying saucer)