Knight and Dragon riddle
A dragon and knight live on an island. This island has seven poisoned wells, numbered 1 to 7. If you drink from a well, you can only save yourself by drinking from a higher numbered well. Well 7 is located at the top of a high mountain, so only the dragon can reach it.
One day they decide that the island is not big enough for the two of them, and they have a duel. Each of them brings a glass of water to the duel, they exchange glasses, and drink. After the duel, the knight lives and the dragon dies.
Why did the knight live? Why did the dragon die? 
The dragon brings water from the 7th well.
The knight expects this so before the dual he drinks from one of the other wells and thus poisons himself, but by drinking from the dragons glass he will be cured.
The knight doesn’t bring any water from the wells but some pure not poisoned water.
The dragon thinks it is poisoned so he drinks from well 7 trying to cure himself but in fact he poisons himself without possibility to be cured.
Your Answer
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