To be clear, despite the slightly snarky tone, I don’t mean to condescend to chemists! Quite the opposite, this is borne out of disappointment when I listen to a whole chem presentation and fail to grasp even one simple idea. I’m a physicist, btw, and could easily fill a presentation with inscrutable equations but what would be the point of that? Instead I make sure that everyone (even a scientifically literate layperson) can stay on board at least the first third of the presentation.