Talk:Existential graph

This article is rated B-class on Wikipedia's content assessment scale. It is of interest to the following WikiProjects:

Philosophy: Logic Mid‑importance This article is within the scope of WikiProject Philosophy, a collaborative effort to improve the coverage of content related to philosophy on Wikipedia. If you would like to support the project, please visit the project page, where you can get more details on how you can help, and where you can join the general discussion about philosophy content on Wikipedia.PhilosophyWikipedia:WikiProject PhilosophyTemplate:WikiProject PhilosophyPhilosophy Mid This article has been rated as Mid-importance on the project's importance scale. Associated task forces: /  Logic

This article contains a translation of Existential Graphs from de.wikipedia.

I added the inference rules for alpha existential graphs. 128.113.137.111 14:58, 5 February 2006 (UTC)Reply

Philip Meguire, October 31 2005. This article is in crying need of examples of existential graphs. Unfortunately, I do not know how to marry the output of graphics software to a Wikipedia entry. For that matter, I can create only alpha graphs on a computer, using boxes rather than ovals. If you would like to marry your graphics skills to my passion for the existential graphs, contact [email protected]

Is offering a link to both the RPI page and the Proof Builder page overkill? The former now offers two applets for proof-building. One of them is my own, I admit.

Changed in the opening line 'invented' to 'proposed' as I believe that there is a semantic clash between 'type of..' and 'invented'. Peirce was not the only one to produce work in this vein and I have added words to this effect in the section on his role.al 16:59, 15 September 2006 (UTC)Reply

The semantic wedges your propose to drive between "invent, "propose," and "type of" elude me. I believe that Peirce indeed invented graphical logic. There is no evidence that any university library in the USA had a copy of the Begriffschrifft until after WWII. Even the Library of Congress had no copy until 1964. Frege's work was known in the English speaking world exclusively through an appendix in Russell's Principles of Mathematics. Frege's notation has remained un-imitated and unstudied until this very day, despite the rise of diagrammatic logic in the past 20-30 years. This revival of graphical logic owes a great deal to Peirce, and nothing to Frege. More generally, I agree with Hilary Putnam and Hintikka that Frege's importance to the unfolding of formal logic over the past 100 odd years has been overstated, at the expense of that of Peirce and Ernst Schroder. At the same time, I hasten to admit that Peirce's graphical logic had no following at all before the 1960s, when Zeman and Roberts wrote their doctoral dissertations on that logic.132.181.160.42 (talk) 21:37, 17 May 2009 (UTC)Reply

Somehow this page won't load anymore. It did load recently (last week) but now has errors. However the last edit was 17 Feb. Does anyone know how this can happen? I'd fix it, but at present I don't fully understand the error message or how to do it. If I figure it out, I'll do it... Doctorambient (talk) 23:39, 21 March 2011 (UTC)Reply

Thank for pointing it out! The article page has been messed up for over a month. Some editor (who certainly seems to have meant well) made an edit that somehow caused the problem, but it's not evident from comparing edits in history how it went wrong. The Tetrast (talk) 23:52, 21 March 2011 (UTC).Reply

Oh thanks! I thought it was just me who couldn't figure out the problem based on the history. That makes me feel a bit better... Doctorambient (talk) 00:22, 22 March 2011 (UTC)Reply

The old version of the page looks normal and doesn't show the blanking of most of the page, though both of us saw it with our own eyes earlier today. Possibly the blanking resulted not even from an edit glitch, but from something else later, who knows what. The Tetrast (talk) 02:08, 22 March 2011 (UTC).Reply

Translated text from the German article and removed the translation needed message. A bag of many boiled potatoes (talk) 23:01, 17 July 2024 (UTC)Reply