Godfrey DiGiorgi wrote:

>On Fri, Sep 17, 2010 at 10:59 AM, Mark Roberts <m...@robertstech.com> wrote:
>> Can I make Lightroom show the set of all collections that do not
>> contain themselves?
>
>It is mathematically impossible. Breaks the assumption of identity in
>the definition of a set. See "Set Theory 1".

Yes, Godfrey. That was the joke I was making.


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