Przeglądaj Bulletin of the Section of Logic według autora "French, Rohan"

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    • An Observation Concerning Porte’s Rule in Modal Logic 

      French, Rohan; Humberstone, Lloyd (Wydawnictwo Uniwersytetu Łódzkiego, 2015)
      It is well known that no consistent normal modal logic contains (as theorems) both ◊A and ◊¬A (for any formula A). Here we observe that this claim can be strengthened to the following: for any formula A, either no consistent ...