If a thing helps make a difference to the scenario, it impacts it, usually in a very beneficial way. If something can make no difference to the scenario, it isn't going to have an impact on it. Such are Dithyrambic and Nomic poetry, in addition to Tragedy and Comedy; https://thermal-shock-vs-thermal68901.blognody.com/39674224/the-definitive-guide-to-localized-thermal-test-systems