First and last, I want you to know it's no joke, Coming from someone who knows, there is no way to fully describe the following event: As he read, carefully, the details of the computer-generated receipt, no question occurred to him. It was only later, after the toilet ceased its whistling, whining, resonant, cold-blooded screaming, that he became aware of the apparent paradox. "How can this be?," he thought glumly. With no hope of obtaining a solution, he decided to forget it.