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nydus/The Game of LogicPublic

This instructional book presents a logic game played with a diagram and nine counters. It explains how to express propositions through the relationship between things and their attributes.

Page 103 of 126
Table of Contents

CROOKED ANSWERS.

      Let "creatures" be Universe; m="monkeys";
          x="soldiers"; y="mischievous".
           No m are x; &there4 Some y are x'.
           All m are y.
      i.e.  Some mischievous creatures are not soldiers.
      ---------------
     | 0     |       |
     |    ---|---    |
     |   | 0 | 0 |   |
18.  |---|---|---|---|        -------
     |   |   |   |   |       | 0 |   |
     |    ---|---    |       |---|---|
     | 0     |       |       |   |   |
      ---------------         -------
       Let "persons" be Universe; m="just";
         x="my cousins"; y="judges".
          No x are m; &there4 No x are y.
          No y are m'.
              i.e.  None of my cousins are judges.
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