Clarke recalls a doctoral colleague comparing traffic analysis with listening to toddlers in another room. Different noises provide clues to activity even when the observer cannot see what is happening. Sudden silence can be a stronger reason to investigate than ordinary background noise. The analogy explains why familiar patterns and departures from them matter. It also prompts a suggestion that analysts' everyday experience can affect how readily they recognize such patterns.
Notable Point · 1:48:56-1:50:30
An everyday analogy for reading signals and silence
A recalled teaching analogy explains how noises, familiar patterns and sudden silence can suggest activity without revealing its full content.