Tuesday's Word

Gravitation,* n. The tendency of all bodies to approach one another with a strength proportioned to the quantity of matter they contain--the quantity of matter they contain being ascertained by the strength of their tendency to approach one another. This is a lovely and edifying illustration of how science, having made A the proof of B, makes B the proof of A.

*The Devil's Dictionary, Ambrose Bierce, The World Publishing Company, Cleveland and New York, 1944.