A grandfather in the United Kingdom picked up a child from a Kent school and took her to a doctor's appointment, then returned her to school later that day. Sounds like a heartwarming afternoon. Except that it was the wrong kid altogether.

Peggy Noonan—White House veteran, Sunday morning talk show staple, author, Wall Street Journal political columnist, and intrepid explorer of America's darkest corners—is paid handsomely to offer her professional, expert political opinions, which many readers take very seriously.