“Simple rules are shortcut strategies that save time and effort by focusing our attention and simplifying the way we process information. The rules aren’t universal— they’re tailored to the particular situation and the person using them.”
We use simple rules to guide decision making every day. In fact, without them, we’d be paralyzed by the sheer mental brainpower required to sift through the complicated messiness of our world. You can think of them as heuristics. Like heuristics, most of the time they work yet some of the time they don’t.