I've already assigned part 6 to a particular analysis in an effort to get me to actually do that work, but I felt that I just had to include this (via John Wilbanks) in the series:

I'm just sayin'. (I may have to get that graph as a tattoo).


P.S. Never mind the date, this is not a trick; I hate online April Fool jokes with the fiery power of a thousand burning suns.