Ruse de guerre belongs to the broader tradition of stratagem, including Sun Tzu's advice on misleading appearances. Light cavalry provides the land-warfare analogy: it gathers information while controlling what enemy scouts can observe. A patrol screen can even leave a route that looks like a hard-won gap in its coverage. The opposing scouts then return believing they discovered the information for themselves, although the patrols guided them toward the picture they were meant to see.
Chapter · 4:59-7:17
Deception controls what the enemy thinks it discovered
Sun Tzu and a light-cavalry analogy frame deception as supplying an opponent with a convincing but curated picture.