I scientist was studying how frogs behaved.
He placed the frog in front of him, on his desk. He then said, "Jump."
And so, the frog jumped. He wrote down, "Frogs can jump."
He took his scalpel, and cut off one of the frog's legs, then said, "Jump."
The frog jumped. He wrote down, "Frogs can jump with three legs."
He then cut off another leg, and then said, "Jump."
Again, although with some difficulty, the frog jumped. He wrote down, "Frogs can jump with only two legs."
The scientist cut off another leg, then said, "Jump."
Even with one leg, the frog jumped. He wrote down, "Frogs can jump with one leg."
The scientist finally cut off the last leg, and said, "Jump."
The frog didn't budge. He repeatadly said jump, over and over with no results. He then proceeded to write, "Frogs, when deprived of all legs, become deaf.
For those who feel sorry and sad for the frog, he had local anesthetic.