"Three Yogis are doing meditative in a remote cave. One day a sound is heard from outside the cave. After about six months, one of the yogis says, "Did you hear that goat?" Once again, there was silence. About a year later, one of the other Yogis says, "That wasn't a goat; it was a mule." Again, there was silence. About two years later the third yogi says, "If you two don't stop arguing, I'm leaving."