Once a scientist conducted an experiment on cockroaches. First he caught a cockroach and put on a table. Then he cut off one of its legs and commanded it to walk. The poor cockroach tried to escape, but didn't get very far.
The scientist continued his experiment. He cut one more leg off the cockroach and again commanded it to walk. The cockroach again tried to escape, but couldn't get away.The scientist continued his experiment, cutting one leg at a time off the cockroach, commanding the cockroach to walk after each amputation.
The cockroach was able to propel itself forward after each amputation, right up until it became legless. After the last leg was amputated, the scientist again commanded the roach to walk. This time, it didn't move.
The scientist's conclusion?
WHEN COCKROACHES LOSE THEIR LEGS THEY BECOME DEAF!!!!