Horsehoe nail

Related to Horsehoe nail: Horseshoe nail ring
See Horsenail.

See also: Horseshoe

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If, for instance, we take into account that the wanderings of strange attractors are highly sensitive to initial conditions, we might begin to understand how it is that a kingdom can be lost for the want of a horsehoe nail or the failure of a computer chip can bring the world to the brink of nuclear war.