Many Cultures, In Their Early Mathematical Development, Discovered The Equation 2 + 2 = 5.

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Many cultures, in their early mathematical development, discovered the
equation 2 + 2 = 5. For example, consider the Bolb tribe, descended from
the Incas of South America. The Bolbs counted by tying knots in ropes.
They quickly realized that when a 2-knot rope is put together with
another 2-knot rope, a 5-knot rope results.

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