Idolatry of certainty vs idolatry of uncertainty.
Those who make a big deal out of their shades of grey, and disparage anyone who, even legitimately, thinks he's got a clue, are also boolean, in their own very silly way. They're just in denial about it.
Me, I think in terms of probability. 0% and 100% are legitimate probability values, and so is anything in between. I don't hold out for absolute certainty. I'll settle for probabilities of 1% or 99%, and predicate my actions on such. No whining about shades of gray for me. But if, for example, it seems irrefutable that one plus one always equals two, I won't shy away from that.
