Arrow Paradox

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Paradox

At any particular instant, a moving arrow is either at rest or in motion.

If the instant is indivisible, the arrow cannot move, because if it did, the instant would immediately be divided.

But time is made up of instants.

As the arrow cannot move in any one instant, it cannot move in time.

Hence the arrow remains at rest.


Resolution


Historical Note

The Arrow Paradox is one of Zeno's Paradoxes, as famously raised by Zeno of Elea.


Sources