Thanks for your kind and warm acknowledgment Berenice.

Yeah sure, we're are always learning and discovering new things but taking your medical example.... Throwing out "On the Origin of Species" for ecologists, would be like throwing out "Gray's Anatomy" for the medical profession.

Nelle, you are one of the kindest and gentlest people I know, you'd have to be a very hard nut to take something you said the wrong way. But I'll have to think about my answer, it's complicated (of course) and I'm not sure where to start. I'll BBL.