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Philosophy:LogicLow‑importance This article is within the scope ofWikiProject Philosophy, a collaborative effort to improve the coverage of content related tophilosophy 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 thegeneral discussion about philosophy content on Wikipedia.PhilosophyWikipedia:WikiProject PhilosophyTemplate:WikiProject PhilosophyPhilosophy Low This article has been rated asLow-importance on theproject's importance scale. Associated task forces: /  Logic

On behalf of the general audience, I have replaced the misleading and confusing expression "just in case", with its correct, and easily understood equivalent, "if, and only if" (also, in more technical writing, "if and only if"). The following explains the error:

• Language Log: "Just in Case"
• Southern California Philosophy for philosophy graduate students: "Just in Case".Dr Lindsay B Yeates (talk)21:27, 9 April 2014 (UTC)[reply]

Is there a problem with the definition of truth function or truth functional? I mean the first sentence says that a truth function gives a truth output value from a truth input value, but later says about propositional logic, propositional logic gives one truth value, which is either truth or false. Is that not contradictory definition???— Precedingunsigned comment added byJosemazcorro (talk •contribs)11:55, 17 March 2019 (UTC)[reply]

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