Scatter Brained Young Lady S PARADOX
A scatter-brained young lady once went into a jewelry
store, picked out a ring worth $5, paid for it, and left. She
appeared at the store the next day and asked if she might
exchange it for another. This time she picked out one worth
$10, thanked the jeweler sweetly, and started to leave. He
naturally demanded an additional $5. She answered him something. Whereupon she stalked
out of the store and left the jeweler wildly counting on his
fingers.
What did she tell?
answer
The young lady
indignantly pointed out that she had paid him $5 the day
before, that she had just returned to him a $5 ring, and that
she therefore owed him nothing.