Use resolution to solve the following puzzle from Wos et al. (1984). Four people: Roberta, Thelma, Steve, and Pete hold eight different jobs, each person with exactly two jobs. The jobs are, chef, guard, nurse, telephonist, police officer, teacher, actor, and boxer. The nurse is a male. The husband of the chef is the telephonist. Roberta is not a boxer. Pete has no education over ninth grade. Roberta, the chef, and the police officer went golfing together.  Who holds which jobs? Show how the addition of a sex bias can change the problem.