I wrote:
> You wouldn't need to remove duplicates if you didn't have duplicates to
> start with.
which is of course true, but....

> In this case that means not selecting a child if it's got a
> younger sibling with the same name, 

I lied. Cousins with the same name could also produce duplicates.
Still someone else (or you:-) could fill in the details...


David


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