The living language is like a cow-path: it is the creation of the cows themselves, who, having created it, follow it or depart from it according to t… - E.B. White

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The living language is like a cow-path: it is the creation of the cows themselves, who, having created it, follow it or depart from it according to their whims or their needs. From daily use, the path undergoes change. A cow is under no obligation to stay.