You’ve heard the phrase, “If it looks like a duck, swims like a duck, and quacks like a duck, then it probably is a duck.” The duck test, while sometimes helpful for identifying species of waterfowl, ...

At a recent class, my daughter’s karate instructor asked the group of assembled seven- to ten-year-olds: “What does it mean to be a leader?” My daughter, back straightening, chin climbing, thrust her ...