[F]uzzy logic uses degrees of truth as a mathematical model of

vagueness, while probability is a mathematical model ofignorance.

## PID controllers are way cooler than the Wikipedia article lets on

PID controllers are all around us. Their straightforward, closed loop cycle of set-point, observation, and response are the basis for almost every control system in our everyday world, but the the Wikipedia article obscures their simple beauty and ubiquity. » about 700 words