Fortunately we don’t have to believe that events are actually driven by pure randomness (whatever that is). It is simply that an assumption of ‘chance’ encapsulates all the inevitable unpredictability in the world, or what is sometimes termed natural variability. We have therefore established that probability forms the appropriate mathematical foundation for both ‘pure’ randomness, which occurs with subatomic particles, coins, dice, and so on; and ‘natural’, unavoidable variability, such as in birth weights, survival after surgery, examination results, homicides, and every other phenomenon
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Pure randomness and natural variability
