Cutting the Cake When I was a kid, and our parents were in a good mood, they would buy a rectangular block of vanilla ice cream and some wafers. They did this winter and summer. My brothers and I would hover around the block as our parents cut the slices of ice cream, not to ensure fairness in distribution, but to make sure no one got more than anyone else. That might sound like the same thing, but there’s a crucial difference in approach. One is positive. The other is negative. If any unfairness was detected, the offended, envious parties…