Without Why, we're lost. Not asking why is comforting in the short term. Nobody benefits from being bludgeoned with poor choices. But in the long term, we're lost if we can't face the why of the choices we are making. Each of us is a blend of science and art. Science is grounded in observation and theory, hard facts and empirical evidence: share prices and crop reports, cholesterol counts and final scores. That's essential; we need hard facts and...