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Path: ...!news.mixmin.net!weretis.net!feeder8.news.weretis.net!reader5.news.weretis.net!news.solani.org!.POSTED!not-for-mail From: Mild Shock <janburse@fastmail.fm> Newsgroups: sci.logic Subject: Andrej Bauer is a red flag (Was: How to prove this theorem with intuitionistic natural deduction?) Date: Sun, 1 Dec 2024 11:56:34 +0100 Message-ID: <vihfd2$8qss$1@solani.org> References: <vhgdq0$19evr$1@dont-email.me> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Injection-Date: Sun, 1 Dec 2024 10:56:34 -0000 (UTC) Injection-Info: solani.org; logging-data="289692"; mail-complaints-to="abuse@news.solani.org" User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Firefox/91.0 SeaMonkey/2.53.19 Cancel-Lock: sha1:x7Lx/jxBxTCDJumrFRXRedYBdhU= In-Reply-To: <vhgdq0$19evr$1@dont-email.me> X-User-ID: eJwFwYEBwCAIA7CXRCjYc4qO/09YAk/LW5HIwGB29WwGnolqLsoscErxpU3rurikruNgnXV3+oun8W6N+ANOsBXp Bytes: 1761 Lines: 26 Hi, > Meanwhile, you might have seen it, I have also asked on SE: > <https://proofassistants.stackexchange.com/questions/4455/negative-translation-for-linear-propositional-logic> Sorry, but I must quite. Anything where Andrej Bauer is a red flag. I remember he was censoring some post of mine, don't remember exactly where it was. You can try searching here: https://groups.google.com/g/sci.logic/search?q=Andrej%20Bauer%20 Julio Di Egidio schrieb: > Dear logicians, > > How to prove the following theorem with natural deduction in > intuitionistic propositional logic (namely, no classical inference rules)? > > `(P -> Q -> R) |- (P /\ Q -> R)` > > Thanks for any help. > > -Julio