Three scientists decided to study flies, and to discuss their observations and conclusions the next day.
The first scientist took a fly, and pulled off its wings. He said, "Fly fly." But the fly just sat there. He said, "Fly walk," and the fly walked away.
The second scientist took a fly, and pulled off its legs. He said, "Fly walk." But the fly just sat there. He said, "Fly fly," and the fly flew away.
The third scientist took a fly, and pulled of its wings and legs. He said, "Fly fly." But the fly just sat there. He said, "Fly walk." But the fly just sat there.
The next day, the three scientists came together to come to the conclusion about flies. This is what they came up with:
1. A fly without wings cannot fly, but can walk.
2. A fly without legs cannot walk, but can fly.
3. A fly without wings or legs is deaf.