When the power to know thyself is a few keystrokes away. — As a psychologist, I know next to nothing about physiology. Fortunately, I would never let a minor detail like that stop me from diagnosing myself with a search-engine-optimized cornucopia of physical ailments. Over the decades I’ve identified colds, flus, migraine headaches, cluster headaches, stomach viruses, stomach ulcers, IBS, Strepp throat…