This article is pretty discursive. Also, it closes with a mangled version of one of my favorite anecdotes, which I will reproduce here to counteract the bad juju:

A carpenter is called to repair a wobbly floorboard in someone's attic. He arrives on the scene, examines the issue, and subsequently hammers a single nail into place, fixing the problem. He leaves a bill of $100, for which the customer angrily demanded an explanation.

"$1 for the nail," said the carpenter, "and $99 for knowing where to put it."