It is said that such a trivial matter as a butterfly flapping its wings will eventually trigger a typhoon half a world away. -Chaos theory

It is said that a butterfly flapping its wings can cause a storm sweeping half the world-chaos theory.

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This is the most popular and well-known expression of chaos theory. The expression of "butterfly effect" originally comes from the paper of E.N. Lorenz, a professor at MIT and one of the founders of American chaos, in 1972: "A butterfly flapping its wings in the Brazilian jungle may set off a tornado in Texas." A chaotic system cannot be predicted, manipulated and controlled, and it is extremely sensitive to the initial conditions of the system. Any slight change in the initial stage of the system will lead to earth-shaking changes in the later stage of the system. ...