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the duck mistress of the farm had three ducks. every day she fed them and filled up three water vessels for them: two small vessels for drinking and one large one for bathing and swimming. every day as she was filling the vessels with clear, clean water, she would call the ducks to come and drink. instead, the ducks were dabbling in the mud and drinking from every stagnant puddle they could find. even though she called them again and again and called them any number of unattractive and perfectly true names, they wouldn't come.
finally one day they tripped over the vessels and said, "oh, look, clean water." one refused to drink. one took a tiny sip to wet his tongue. one plunged in, swam, dipped and drank his fill. and the duck mistress was happy.