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    $\begingroup$ Can I get you interested in joining the tautology club? $\endgroup$ Commented Apr 26, 2017 at 15:36
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    $\begingroup$ @Mindwin Ah, but the amazing thing about these "Henkin sentences" is that they are not so trivial to prove. $\endgroup$ Commented Apr 26, 2017 at 15:50
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    $\begingroup$ This made my world that much bigger. Thank you. $\endgroup$ Commented May 2, 2017 at 2:52