Karl Albert tells about a young man who applied for a job that involved operating a small train station along a remote section of the track. The personnel officer of the train company interviewed him carefully to find out his qualifications. Then the personnel officer said, "Well, it looks like you have the basic qualifications for the job. But we need somebody who can think on his feet and solve problems if they come up. Can you do that?"

The young man replied, "Well, I think so."

The personnel officer said, "Okay, I'll give you a hypotheti…