From: utzoo!utcsrgv!thomson Newsgroups: net.jokes Title: Two-for-one yucks sale Article-I.D.: utcsrgv.416 Posted: Wed Jun 23 12:02:11 1982 Received: Wed Jun 23 15:35:26 1982 A young student had just miserably failed his introductory calculus exam, something his roommate couldn't understand. "I thought you had that stuff down cold," he puzzled. "What went wrong?" "There wasn't a thing I could do," explained the washout. "I was sitting between identical twins." "So?" "I just couldn't differentiate between them!" An engineer boarding a flight to Amsterdam noticed that the flight attendant was asking the passengers whether they were Polish. Those who were got directed to seats on the left side of the airplane, while the non-Polish were distributed everywhere else. Having just read his network news on the subject of ethnicity, the engineer was brimming with self-righteousness and prepared to upbraid the young attendant for her callous behaviour. "Look, I'm an engineer so I understand damn near everything, but I can't see any possible justification for isolating Polish people like this!" "Well," explained the attendant, "I didn't think I'd ever have to tell an engineer that a system is unstable if it has Poles in the right half-plane."