Dan was the doorman of a club in a big city. Every day, thousands of people passed by his door, and many of them would stop to ask him, "What's the time, please?"
After a few months, Dan thought to himself, "I'm tired of answering all these people. I'll buy a large clock and put it on the wall here." He did just that.
"Now people won't stop to ask me the time," he thought happily. However, after the clock was installed, many people stopped, looked at it, and then asked Dan, "Is that clock right?"