> For instance, even a child informed about biology can answer basic questions like these: - Does a child have (biological) parents? - Yes. - How many? - Two, a (biological) male and (biological) female. [...] They can similarly see other kinds of self-referential data even at a young age, well before they program.

Isn’t this a horrific example for recursion? Wouldn’t most adults realise that the structure isn’t a tree (hi uncle grandma), and that it’s leaf boundaries are fuzzy. Or is that the point?

Apart from the fact that in a modern children’s classroom, bringing up parental discussions is going to be very complicated by other factors.

> These confuse recursion with cyclicity. If you don’t understand the difference, don’t use the dumb jokes.

Well, except cyclicity has a bunch of different meanings - I did a quick search and didn’t find a good reference for the sense they are using.