When I was a kid, I used to lose myself in the Fighting Fantasy ‘choose your own adventure’ books. I’d map out the best paths through the story, making copious notes on optimal outcomes with deadly creatures trying to cut my reading short and my limbs shorter. I’d play along with dice, and unlike my reckless friends, try not to skip ahead to see if my choices were the right ones. If I died, I started over, and there was a tremendous sense of achievement in being able to successfully remember how to get to the end with one’s life intact.