Good point, however communication is about what other people are liable to understand. To your final sentence I would append "within the context of that group o

Good point, however communication is about what other people are liable to understand. To your final sentence I would append "within the context of that group of people". Usage of language is liable even in our interconnected world to diverge and this is perfectly acceptable. It is probably more meaningful yet to define whether a particular usage is useful than correct.