Here are three tests to see if you're old: Does it hurt you to know that, right now, the actor Ralph Macchio is older than the actor Pat Morita was, when he played Mr. Miyagi in The Karate Kid? The television show Happy Days was on back in the 1970's, but it was set twenty-ish years before, in the 1950's – which, if you were my age at the time seemed like a long, long way back. But...