There were sixteen other students in the class. For all we know, theses about fun things could have been in the majority.

Yeah, maybe.

If you accept what I wrote in the GP, where do you see a contradiction in the four statements? And if you don't, could you try to articulate why?

No, no I don't think you had a contradiction either. I was just saying that you could do the same thing with "fun." And maybe other kids did, as you say.