One day I noticed my sister wasn't wearing a watch. When
I asked her about it, she replied, "I don't need a watch.
At home there's a clock in every room, and in the car there's
a clock on the dashboard."
Knowing my sister's an avid shopper, I inquired, "Well,
how do you tell time when you're shopping?"
"That's easy," she replied. "I just buy something
else and then look at the time printed on the sales receipt."
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