A) I thought I'd posted this a week ago, but:

D'oh! Negative concord! Of course!

and

2)
Originally Posted By: Jackie
It's not like it isn't a feature of many languages. grin

That's not quite the same thing. Yeah, there's two negatives in there but they're not supporting each other. It's like the difference between

a) I couldn't fail to disagree with you less.

and

ii) I don't like to have to kill nobody without they ain't no chance of no gold in it for me.