There are three schools of magic. One: State a tautology, then ring the
changes on its corollaries; that's philosophy. Two: Record many facts.
Try to find a pattern. Then make a wrong guess at the next fact; that's
science. Three: Be aware that you live in a malevolent Universe controlled
by Murphy's Law, sometimes offset by Brewster's Factor; that's engineering.

You want it in one line? Does it have to fit in 80 columns? :-)
-- Larry Wall in <7349@jpl-devvax.JPL.NASA.GOV>