As anti-sunscreen misinformation spreads online, skin cancer advocates say beware

One chestnut I remember from my time as a cadet at the Royal Military College of Canadain the ’90s comes from Sun Tzu, the Chinese military strategist credited with writing The Art of War: “Know yourself and you will win all battles.” Sun Tzu is, of course, also known for the axiom of knowing your enemy by becoming your enemy, but at the same time he believed that, to plan for victory, knowing yourself was key. In war or in life, we may not always understand our adversary. But, since we can plan the next battle only by measuring the last, knowing yourself means taking a clear-eyed look...