I’ve been doing some work lately as an expert witness, so I found the following factoid quite interesting. The most commonly quoted song lyric in judicial opinions is from Bob Dylan’s Subterranean Homesick Blues: “You don’t need a weatherman to know which way the wind blows.” How do I know this? The law professor Alex B. Long is described as the leading expert on music citations in judicial opinions, and his analysis can be found in an article in yesterday’s New York Times. Couple this with Arthur C. Clarke’s fourth law (“For every expert there is an equal and opposite expert”) and we see that, especially in a court of law, two expert weathermen will generally tell you the wind is blowing in opposite directions.