If the behavior differs, how we can assume it's the same function neurologically? Yes, that's a leap.

No arguments there, I think I have said as much. The real thing I value about it is simply that it acknowledges that the function's position in the model impacts expression of the function.Contrived, definitely. Almost astrologically so.

I still don't know how he comes up with assigning one function to parent, one to child, etcetra... Astrology seems more sound sometimes. At least my sign LOOKS like an archer...

Pants, ick. I hope there's a pair of jeans in there somewhere...I'm rapidly moving towards the "function theory is a pile of pants" model.