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Simple messages are core and compact.

At one level, the idea of compactness is uncontroversial. Rarely will you get advice to make your communications lengthy and convoluted, unless you write interest-rate disclosures for a credit card company. We know that sentences are better than paragraphs. Two bullet points are better than five. Easy words are better than hard words. It’s a bandwidth issue: The more we reduce the amount of information in an idea, the stickier it will be.

But let’s be clear: Compactness alone isn’t enough. We could latch on to a compact message that isn’t core; in other words, a pithy slogan that doesn’t reflect our Commander’s Intent. Compact messages may be sticky, but that says nothing about their worth. We can imagine compact messages that are lies (“The earth is flat”), compact messages that are irrelevant (“Goats like sprouts”), and compact messages that are ill-advised (“Never let a day pass without a shoe purchase”).