## Symbolic Logic and the Game of LogicThe two works reprinted in this volume are a unique fusion of logical thought and inimitable whimsy. Written by the 19th-century mathematician who also gave us "Alive in Wonderland", they are among the most entertaining logical works ever written, and contain some of the most thought-provoking puzzles ever devised. |

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### Contents

DIVISION | 1 |

CHAPTER I | 8 |

CHAPTER II | 11 |

Propositions heginning with Some | 18 |

The xClass similarly divided | 24 |

CHAPTER II | 26 |

REPRESENTATION OF PROPOSITIONS | 28 |

The Proposition Some x are y | 30 |

Example worked | 92 |

CLASSIFICATION | 94 |

BOOK VIII | 97 |

CHAPTER II | 125 |

Solutions for 1 | 134 |

HOTES | 164 |

Seven other similar Pairs | 167 |

NOTES TO APPENDIX | 195 |

CHAPTER IV | 36 |

The Inner Square and the Outer Border have thus heen | 40 |

The Pair of Converse Propositions | 44 |

Rules | 53 |

Consequent | 59 |

Given a Trio of Propositions of Relation of which every | 66 |

Three other similar Pairs | 72 |

Rules | 73 |

The Symhol | 85 |

Underscoring | 91 |

197 | |

Peculiar Attrihutes | 198 |

Differentia | 2 |

CROSS QUESTIONS | 37 |

Fifteen other similar Propositions | 49 |

CROOKED ANSWERS | 55 |

Rules 84 | 84 |

HIT OR MISS | 85 |

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### Common terms and phrases

ahont ahout animals asserted to exist assigned Attrihutes Biliteral Diagram cats chickeus codivisional Classes Compartment Conel Conelusion right Copula creatures deserve the fair Differentia Eliminands not asserted English hooks Entity-Premiss equivalent example exist.l existing Things Fallacy of Uulike gamhlers Genus Grey heen hegin helonging Hence proposed hetween hooks exist hoth hoys Inner lamhs Let Univ let us suppose Let us take letters Memhers Method of Diagrams North Half North-West Cell not-y Nullities ouly Pair of codivisional Pair of Premisses persons phrase Predicate Prohlems proposed Conelusion proposed Premisses Proposition of Existence Proposition of Relation Reader Red Counter rememher represent hy placing represent the three Retinends shonld Sign of Quantity Similarly soldiers Sorites Specieses Suhject Suhstantive Syllogism Tahles Terms trauslated Triliteral Trio understand French Universe of Discourse uuless Uulike Eliminands verh whyo x are y xy exist y are x