Guest Post by Edward Elliott Walking between flights at Newark Liberty Airport today, a woman standing at a sales kiosk spoke to me, “Sign up for our credit card. 30,000 frequent flier miles for signing. Wouldn’t you like a free flight?” “I already have your card.” “Sign up for our credit card,” she said – again. She hadn’t listened to my answer. It’s embarrassing. You ask a question. You’re being polite – maybe not interested in the answer. Your friend answers, and you follow with silence. What did he say? Oops. Awkward. And the friend gets the message. You weren’t really interested. I suppose we’ve all done it. A couple...