The significance of Lorenz’s butterfly effect is not, however, just the nonlinear escalation of a minor input into a major output. There’s uncertainty involved; the amplification of the disturbance is not the product of a single, constant, identifiable magnifying factor—any number of seemingly insignificant inputs might—or might not—result in nonlinear escalation. If every butterfly’s fluttering always led to a hurricane halfway across the world two days later, weather would be predictable (if insane). The butterfly’s fluttering leads to a storm only if thousands of other minor conditions are
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