Roger was one of my best friends for 30 years. He was logical to the point of pain-in-the-ass and we spent hundreds of hours on the phone when we didn't live in the same town, talking about science and theories and unraveling the universe. He taught me so much, but if there's one lesson brightest in my mind it's to always ask, "How do you know?" And it's amazing how many answers fail that simplest of tests.
"Let's find out," he would say.
"Let's find out," he would say.

