# Bilateral Diagrams

The meaning of the diagrams below has been explained elsewhere. Here I only collected the simplest configurations for the reference sake.

Some x exist | No x exist | |||

Some x' exist | No x' exist | |||

Some y exist | No y exist | |||

Some y' exist | No y' exist |

Some xy exist = Some x are y = Some y are x | No xy exist = No x are y = No y are x | |||

Some x'y exist = Some x' are y = Some y are x' | No x'y exist = No x' are y = No y are x' | |||

Some x'y' exist = Some x' are y' = Some y' are x' | No x'y' exist = No x' are y' = No y' are x' | |||

Some xy' exist = Some x are y' = Some y' are x | No xy' exist = No x are y' = No y' are x |

All x are y | All x are y' | |||

All x' are y | All x' are y' | |||

All y are x exist | All y are x' | |||

All y' are x | All y' are x' |

Some x are y, some are y' | Some x' are y, some are y' | |||

Some y are x, some are x' | Some y' are x, some are x' |

### Lewis Carroll

- Lewis Carroll's Logic Game (an introduction)
- Controversial Venn Diagrams
- Bilateral Diagrams
- Syllogisms
- Lewis Carroll's Logic Game (trilateral diagrams)
- Sample soriteses
- Lewis Carroll's Logic Game (rules and a tool)

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