This is from Dave Coble and was published on the Groaners listserv.
To conclude the course’s segment on science fiction, the teacher assigned the class a paper on any topic they wished having to do with science fiction. The next week, after the papers had been turned in, the professor was grading them and came across this paper:
There once was an Israeli border guard named Isaac. Across the border from Isaac, Abdul, an Arab border guard, had his post. … Read the rest...