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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 62 of 126
Table of Contents

CROSS QUESTIONS.

are free from greediness.

  1. All greedy rabbits are young.
  1. No old rabbits are greedy; All black rabbits are greedy.
  1. All rabbits, that are not greedy, are black; No old rabbits are free from greediness.

Taking "birds" as Universe; m="that sing loud"; x="well-fed"; and y="happy"; represent

  1. All well-fed birds sing loud; No birds, that sing loud, are unhappy.
  1. All birds, that do not sing loud, are unhappy; No well-fed birds fail to sing loud.
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