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Suppose you have two glasses. A and B
Glass A is full of milk and glass B is full of water.
Suppose you take a spoon of water from glass B and mix it into the milk in glass A. Next, you take a spoon of the mixture in glass A and mix this into glass B.
Suppose you keep doing this till infinity…
Will the two glasses hold equal amounts of both liquids ? Will the liquid all evaporate ? Will all the milk be transferred to glass B and all the water to glass A ???