An Introduction to Modal Logic

An introduction to modal logic; a gift from Aristotle.

 
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4 Comments:

  1. Tales of Modernity - All philosophy is a footnote to Plato (and Aristotle!) Says:

    […] Guy presents An Introduction to Modal Logic commenting on his submission, “Plato and Aristotle have contributed many things to the […]

  2. Thad Says:

    If you like this comic you might also enjoy:

    http://www.thadguy.com/comic/an-introduction-to-unchallengable-statistics/172/

  3. Babu Says:

    Um, “it is possible that” does not entail “it is that”. Invalid.

  4. james Says:

    (3) does not follow from (1) and (2) and thus your attempt at discrediting modal logic is clearly fallacious. Given (1) and (2) you can only conclude that “it is possible that prince edward is the most common entity on prince edward island” but not that “prince edward is the most common entity on prince edward island.” and surely, being that we are not dealing with a necessary truth here, it is indeed possible that in some possible world prince edward is the most common entity on prince edward island, however based on prior knowledge from our actual world we know this is not the case.