An optimist who went hunting with a pessimist wanted to show off his new dog.
After the first shot, he sent his dog to fetch a duck. The dog ran across the top of the water and brought back the game.
The pessimist said nothing.
The dog retrieved the second and third ducks the same way – over the water.
Still, the pessimist did not react.
Finally, the optimist could stand it no longer. “Don’t you see anything unusual about my new dog?” he asked his companion.
“Yes – he can’t swim.”