To an extent I can describe it the concept would be "jargon" on a broad level. https://en.wikipedia.org/wiki/Jargon https://en.wikipedia.org/wiki/Jargon Thus,

To an extent I can describe it the concept would be "jargon" on a broad level. https://en.wikipedia.org/wiki/Jargon https://en.wikipedia.org/wiki/Jargon Thus, certain groups engage in trying to build up minor tests or cues to test a person's depth or familiarity with a professional subject. So if I'm talking to a person at a bar, and I find out they work at a major bank, say, Comerica, I can probe enough, politely, to probably understand what they do. This level of professional knowledge is not easily faked - it's like a web of synaptic references tagged to various terms and concepts (mostly "made up" for an industry).