**“** But all propositions of logic say the same thing. That is, nothing. **”**

Ludwig Wittgenstein, *Tractatus Logico-Philosophicus* (1921). copy citation

Author | Ludwig Wittgenstein |
---|---|

Source | Tractatus Logico-Philosophicus |

Topic | logic proposition |

Date | 1921 |

Language | English |

Reference | |

Note | Translated by C. K. Ogden |

Weblink | http://www.gutenberg.org/files/5740/5740-pdf.pdf |

## Context

“That from a fact p an infinite number of others should follow, namely, ~~p, ~~~~p, etc., is indeed hardly to be believed, and it is no less wonderful that the infinite number of propositions of logic (of mathematics) should follow from half a dozen «primitive propositions».

But the propositions of logic say the same thing. That is, nothing.

5.44 OGD [→GER | →P/M] Truth-functions are not material functions.

If e.g. an affirmation can be produced by repeated denial, is the denial—in any sense—contained in the affirmation? Does «~~p» deny ~p, or does it affirm p; or both?” source

But the propositions of logic say the same thing. That is, nothing.

5.44 OGD [→GER | →P/M] Truth-functions are not material functions.

If e.g. an affirmation can be produced by repeated denial, is the denial—in any sense—contained in the affirmation? Does «~~p» deny ~p, or does it affirm p; or both?” source