This does not mean that people are correct in what they believe about the future either: only that their errors are random.

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Instead of trying to eliminate this, he said, it should be embraced to produce so-called "stochastic processors" that are subject to random errors.

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The causes are not known but probably include a combination of inherited bad genes, bad diet (too much fat and red meat, too few vegetables) and random genetic errors that occur as cells divide.

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