Riddle:
A young man entered a pet shop in search of a talking parrot. On one of the cages, he saw a sign saying, "This parrot repeats everything it hears." The man bought the parrot and tried to teach it to speak. Yet, he was unsuccessful. The bird didn't say one word in over 2 weeks. So the man decided to return the parrot and accused the shopkeeper of lying. However, the shopkeeper insisted that he was saying the truth...
How is this possible?
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Hint:
The shopkeeper
sold the man a not-so-healthy bird...