[throwaway2037]

    > submarine advertised 

I never heard of this term before. What does it mean? And can you give an example?

[082349872349872]

https://www.paulgraham.com/submarine.html

Examples aplenty (from biblical times to the present, albeit in a slightly different domain) to be found in Linebarger, Psychological Warfare (1954)

> Almost all good propaganda—no matter what kind—is true. It uses truth selectively.

(note that PR people used to call themselves "propagandists" in peacetime as well, until WWI gave that a bad rep, and they needed to rebrand)