Intelligence (long and racist) *I'm not racist; this is how the joke was told to me by my racist ass granddad. Best told in a Georgia accent.* Two niggers, Calvin and Rastus, are digging a ditch for their boss one hot summer's day. It's REALLY hot, both of them are soaked in sweat. After an hour or so, Calvin pipes up, ""Man Rastus, how it is dat we down here digging dis here ditch, doin' all tha work in the hot sun, and de boss man up theah sittin' in his truck under de tree in de A/C, and he g…