If my experiences are anything to go by, my vocabulary and way of speaking. Or really a lot of people’s.
This is something I don’t get. These people, when given a mathematical equation, treat the whole equation as a whole puzzle and use all its pieces to solve it. But if you say something that’s simply too wordy or where the words are “too thesaurus-like” (often to fix the first thing), they don’t “add it up” and they dump on you with Jimmy Neutron memes. I (while not being Marxist myself) remember one of my first experiences in the fediverse was talking about Marxist concepts to people who identified as Marxists and wondering from their confused reaction if they knew what Marxism entailed.