Yes, you need to send a thank-you note after a job interview. This might be unwelcome news, especially if you sided against the somewhat old-fashioned practice at the center of the recent, highly contentious online debate surrounding an article by Business Insider executive managing editor Jessica Liebman. In a post for Business Insider, Liebman wrote that when she first started hiring, she came up with "a simple rule: We shouldn't move a candidate to the next stage in the interview process unless they send a thank-you email." Plenty of people disagreed with Liebman, but her stance gets at the very...