I think the debate comes from the "public" opinion of what PG is and not the bands of grey as you get to EG. And some of us would defint those grey bands as EG not PG, as defined by DYS.
Someone mentioned that calculus would be hard to do without some teaching. I disagree. If I don't have enough money to buy a house and the guy selling the house sells me the option to buy it in six months at a set price, I have a derivative, that's calculus.
I imagined everyone here followed the example, hence an uber bright PG child could do derivative concepts in his head just like he knows how to do a puzzle.
And yes, kids are not black and white, but there seems to be so many darker shades of grey before you get to that little man Tate phenomenom of PG.
There are moments of head turning when my child says something, and she did sit down at her Barbie piano and do a scale at 2, but I don't expect her to play like Mozart any time soon. To me it is EG, not PG. Maybe not by Davidson definition, but my view of PG.
Ren
