YOU arrive for Christmas dinner. Your mother has left your father for a woman and you are meeting her for the first time. What do you do?
Your Uncle Eric loves Fox News. Your sister Jen listens only to NPR. Which of these are appropriate dinner table conversations?
Your niece Emily gets one temporary job after another, but the minute the company has to hire her permanently and give her benefits they fire her. What do you say to her?
Answers to these and other tricky questions at the New York Times.