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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 82 of 126
Table of Contents

CROOKED ANSWERS.

  1. Some x' exist. i.e. Some houses are not built of brick.
  1. No x are y'. Or, no y' are x. i.e. No houses, built of brick, are other than two-storied. Or, no houses, that are not two-storied, are built of brick.
  1. All x' are y'. i.e. All houses, that are not built of brick, are not two-storied.
  1. Some x are y, and some are y'. i.e. Some fat boys are active, and some are not.
  1. All y' are x'. i.e. All lazy boys are thin.
  1. All x are y', and all y' are x. i.e. All fat boys are lazy, and all lazy ones are fat.
  1. All y are x, and all x' are y. i.e. All active boys are fat, and all thin ones are lazy.
  1. No x exist, and no y' exist. i.e. No cats have green eyes, and none have bad tempers.

Some x are y', and

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