Rules about social interaction are often too general to be really useful to me, but I found this one insightful:
> If making references that are outside someone’s context, do so only if they signal themselves as a curious person, and make them come from a place of genuine interest in informing, rather than bragging.
This is something I struggle with when talking to new people. How much to lean towards introducing them to things they don't know but may find interesting versus not wanting them to feel like an outsider or dumb by bringing up stuff they don't know.
Paying attention to how they signal their curiosity and sense of safety is a good way to gauge that.