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Dec 30, 2021 at 19:14 history edited user21820 CC BY-SA 4.0
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Oct 16, 2021 at 13:26 vote accept Peter Gerdes
Oct 13, 2021 at 16:33 answer added Peter Gerdes timeline score: 2
Oct 13, 2021 at 16:16 comment added Peter Gerdes Ahh, excelent! thanks!
Oct 13, 2021 at 4:54 comment added Emil Jeřábek In fact, $T'=T_S$: take for $t$ the Skolem term witnessing the tautology $\exists y\,(\phi(y)\to\forall x\,\phi(x))$.
Oct 13, 2021 at 0:49 history asked Peter Gerdes CC BY-SA 4.0