Good question. I think if you spend enough time with them, you'll know. I know someone who always gets inventive with words in writing ... (unless writing up legislation) ... mostly because he fancies himself smart and intellectual ... and typically claims to be writing for the top 5% of knowledgeable readers.
Of course, it's yet another hindrance he arbitrarily places on his written communication. Reader comprehension, for him, takes a backseat to: number of syllables, line breaks, piling on adjectives in place of prepositional phrases, constantly sticking to active voice, opting for the more pejorative tems, etc .... all kinds of non-essential minutiae just so he can claim the title of "detail fanatic." "Mastery of detail is power" he says.
He claims to hate writing but that's pretty much mostly what his job entails.
LOL at "inseminate" instead of "disseminate."