One important implication of the gap theory is that we need to open gaps before we close them. Our tendency is to tell people the facts. First, though, they must realize that they need these facts. The trick to convincing people that they need our message, according to Loewenstein, is to first highlight some specific knowledge that they’re missing. We can pose a question or puzzle that confronts people with a gap in their knowledge. We can point out that someone else knows something they don’t. We can present them with situations that have unknown resolutions, such as elections, sports events, or mysteries. We can challenge them to predict an outcome (which creates two knowledge gaps—What will happen? and Was I right?).

To make our communications more effective, we need to shift our thinking from “What information do I need to convey?” to “What questions do I want my audience to ask?

But to prove that the knowledge gaps exist, it may be necessary to highlight some knowledge first. “Here’s what you know. Now here’s what you’re missing.” Alternatively, you can set context so people care what comes next. It’s no accident that mystery novelists and crossword-puzzle writers give us clues. When we feel that we’re close to the solution of a puzzle, curiosity takes over and propels us to the finish.

The lesson for the rest of us is that if we want to make people care, we’ve got to tap into the things they care about. When everybody taps into the same thing, an arms race emerges. To avoid it, we’ve either got to shift onto new turf, as Thompson did, or find associations that are distinctive for our ideas.

There is a curious disconnect between the amount of time we invest in training people how to arrive at the Answer and the amount of time we invest in training them how to Tell Others. It’s easy to graduate from medical school or an MBA program without ever taking a class in communication.