Thanks for the great response!

Interesting, because we dipped into morality in a sense - we were talking about biological organisms 'instinctively' KNOWING what to do like breathing pumping blood in the almost same way a Star by its nature fuses hydrogen and helium in its core and I said something along the lines of ' We know the sun fuses hydrogen etc, and we know animals instinctively pump blood and they instinctively do other things like drink water, graze the land, run from predators etc'

And he asked "Why SHOULD the sun do those things"

I said thats like asking why should the sun be the sun

Then he said "Yeah. Why should the sun be the sun" - and other things like Why SHOULD A be A or why should B have features of B or why should C have perform the functions C performs like why should a cloud rain

We were talking about morality before so now I'm thinking maybe he was thinking in moral/evaluative terms when it doesnt make sense here just like trying to derive an ought from an is - "Why ought A be A"