arguing about Cimrman’s realness is actually a glorious way to fuck with many teachers, since almost the whole country is in on the joke that Cimrman was a real person, when you convincingly argue that Cimrman invented/wrote/discovered XY, the teacher is effectively trapped because either they have to accept your bullshit explanation or admit that Cimrman is not real and therefore break the joke and betray the national pride
many of my highschool teachers would preemptively inform us that they will not accept Cimrman as an answer (“we know, we know, he helped invent everything, write about the other people”) just to avoid this