Greg,

Your point is worth pursuing, and I've made a number of attempts to start threads discussing the issue.

All have been filled with crap, by people who prefer to 'hear/read' themselves (and their half-baked opinions) rather than doing a bit of basic research.

It's a complex question, certainly.

I would however imagine that the amount of nonsensical junk generated here is part of the reason that Malcolm prefers to discuss such question in more erudite company.