I'd like to know if $x\in y \land y\in x$ is possible under the ZFC set theory.
I appreciate any help!
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I feel that I close that one as a duplicate about once a month. – Asaf Karagila Oct 08 '18 at 09:58
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@AsafKaragila But I'm asking a different question. – Jiu Oct 08 '18 at 10:00
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No, you really don't. And if you read the answers, you'll find out why. But fine, I'll find you more duplicates. – Asaf Karagila Oct 08 '18 at 10:00
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@AsafKaragila Thanks – Jiu Oct 08 '18 at 10:13