Japanese expression ~17~ 矛盾 contradiction

  In Japanese, 矛盾（mu jun）means "contradition".
This word has a story which comes from Chinese culture.
As you may know, Japanese culture has been affected by Chinese culture.

 矛 means "A sword"
盾　means "A shield"

 Long time ago, there was a man who is selling a sword on the street.
He said to the customers, "This sword is so great. It can pierce any shields."
He was also selling a shield there.
He said to the customers,"This shield is so great. There are not any swords
which can pierce this shield".
One customer asked to the shopkeeper, "What happens if you pierce
the shield with the sword in hand?"

You know, this shopkeeper's word has contradiction.

  This word 矛盾　means "contradiction."