Mark writes: I am a competitive speed-solver of Rubik’s cubes. There is a debate in our community about whether competitive cubing is a sport. I think it is. If poker and car racing can be considered sports, why isn’t speed-cubing?

You have a nimble mind and speedy fingers, but you are dumb and wrong. Speed-cubing is not a sport because it does not involve physical exertion and/or risk. Auto racing is a sport because you can die. (Poker is not a sport; it is a game.) What’s more, most sports derive from the ancient practice of giving young warriors something to do when not killing. This martial aspect is why archery is a sport but darts isn’t, because darts can’t kill. Erno Rubik is not a warrior but an architect, academic and nerd: He built a cube to solve, not a ball to hit. Honor that distinction.