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Thread: Setian Semantics

  1. #1 Setian Semantics 
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    Challenge: denote a set that contains and is a set that contains the null set.


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  3. #2  
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    Hint: I'm looking for the symbolic representation of a set with a two-fold containment of the null set; containing it not only as an element, but as an element of another element...simultaneously.


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  4. #3  
    Forum Professor river_rat's Avatar
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    Something like {∅ , {∅}}?

    Is this setian as in temple of set?
    As is often the case with technical subjects we are presented with an unfortunate choice: an explanation that is accurate but incomprehensible, or comprehensible but wrong.
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