A muscular young man at the construction site bragged that he could outdo anyone in a feat of strength. After several minutes, an older (and wiser) worker had had enough.
“Why don’t you put your money where your mouth is?” said the older fellow. “I bet a week’s wages that I can haul something in a wheelbarrow over to that building that you won’t be able to wheel back.”
“You’re on, old man,” the young guy replied.
The old man reached out and grabbed the wheelbarrow by the handles. Then he turned to the young man and said, “All right. Get in.”
We do precision guesswork.