:theory: n. The consensus, idea, plan, story, or set of rules that
is currently being used to inform a behavior. This usage is a
generalization and (deliberate) abuse of the technical meaning.
"What's the theory on fixing this TECO loss?" "What's the
theory on dinner tonight?" ("Chinatown, I guess.") "What's
the current theory on letting lusers on during the day?" "The
theory behind this change is to fix the following well-known
screw...."
-- The AI Hackers Dictionary