This is a quote from the book "Animal Farm" by George Orwell
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Their most faithful disciples were the two cart-horses, Boxer and Clover. These two had great difficulty in thinking anything out for themselves, but having once accepted the pigs as their teachers , they absorbed everything that they were told, and passed it on to the other animals by simple arguments. They were unfailing in their attendance at the secret meetings in the barn, and led the singi ng of ‘Beasts of England’, with which the meetings always ended.

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