Made to Stick: Why Some Ideas Survive and Others Die

by Chip Heath

EXPLANATION 1: A pomelo is the largest citrus fruit. The rind is very thick but soft and easy to peel away. The resulting fruit has a light yellow to coral pink flesh and can vary from juicy to slightly dry and from seductively spicy-sweet to tangy and tart. Quick question: Based on this explanation, if you mixed pomelo juice half and half with orange juice, would it taste good? You might make a guess, but the answer is probably a bit ambiguous. Let’s move on to an alternative explanation: EXPLANATION 2: A pomelo is basically a supersized grapefruit with a very thick and soft rind. Explanation 2 sticks a flag on a concept that you already know: a grapefruit. When we tell you that a pomelo is like a grapefruit, you call up a mental image of a grapefruit. Then we tell you what to change about it: It’s “supersized.” Your visualized grapefruit grows accordingly. We’ve made it easier for you to learn a new concept by tying it to a concept that you already know.