Not only are you trying to be pedantic, but you also don't even seem to understand the rule you're trying to be pedantic about.
That method does accept two parameters, since two is in the range of 0..N. The opposite of accept is reject, and if that function rejected
two parameters, the tests would not pass.

Also, why are you criticizing people for improving the function by not limiting the amount of names a person can have? At least hundreds of millions of people in the world have more than two names.

This works fantastic, but I'm struggling to understand HOW it works. Could anyone explain?

This is pedantic but the description does say:

Create a function ... that accepts two parameters

Although the test cases doesn't test for the amount of parameters, this solution would technically be incorrect as it accepts 0 to N parameters.

Hey thanks for letting me know, this whole time I thought the solutions you can see matched your version. I know in 3 this would still work if put all this in another parenthesis and "list" in front, which is still cool

Is this python 3? I didn't know you could do this 😮

This does not return the right answer for negative n, e.g., n = -8.

It has less complexity (only sorts n items instead of len(xs)), so for large xs's and small n's its worst case should be better. Performance on real-world data is to be tested.

Wow, I didn't know I could use cmp like that. Neat!

Third order polynomials? What black magic is this? I'd love an explanation...

Anyway, this is my favorite solution now.

Image added. There is a link with more informations.
Thank you for the feedback.