mean value theorem
Cop 1 and Cop 2 are one mile apart. Cop 1 sees a car go the speed limit at 40 mph. Cop 2 sees the same thing. However, they radio each other and realize that it went from Cop 1's location to Cop 2's location in 30 seconds. The mean speed had to be 120 mph, so even though they didn't see it, they know he did it.
METAMIA is a free database of analogy and metaphor. Anyone can contribute or search. The subject matter can be anything. Science is popular, but poetry is encouraged. The goal is to integrate our fluid muses with the stark literalism of a relational database. Metamia is like a girdle for your muses, a cognitive girdle.