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Certain animals such as cows are called ruminants; this means that they chew their cud, meaning, they eat a mass of vegetable matter, usually grass, and chew it into a kind of wad, and then chew that quite a bit, to soften it up for digestion. People have always imagined that a cow chewing its cud looks strangely thoughtful, so the term rumination has come to also mean, deep thought.

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13y ago

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