# Difference between revisions of "Sound argument"

From Lesswrongwiki

m (moved Sound logic to Sound argument) |
m (formatting/wikilink/renaming) |
||

Line 1: | Line 1: | ||

− | {{wikilink| | + | {{wikilink|Sound argument}} |

+ | '''Sound argument''' is argument that is [[Valid argument|valid]] and whose premises are all true. In other words, the premises are true and the conclusion necessarily follows from them, making the conclusion true as well. | ||

− | + | For example, consider the following syllogism: | |

− | + | * All multiples of ten are multiples of five. (True premise/All A are B) | |

− | All multiples of ten are multiples of five. (True premise/All A are B) | + | * 30 is a multiple of ten. (True premise/C is A) |

− | + | * Therefore, 30 is a multiple of 5. (True conclusion/Therefore, C is B.) | |

− | 30 is a multiple of ten. (True premise/C is A) | ||

− | |||

− | Therefore, 30 is a multiple of 5. (True conclusion/Therefore, C is B.) | ||

==See also== | ==See also== | ||

− | *[[Valid | + | *[[Valid argument]] |

[[Category:Concepts]] | [[Category:Concepts]] | ||

− | {{ | + | {{stub}} |

## Latest revision as of 06:02, 23 January 2011

**Sound argument** is argument that is valid and whose premises are all true. In other words, the premises are true and the conclusion necessarily follows from them, making the conclusion true as well.

For example, consider the following syllogism:

- All multiples of ten are multiples of five. (True premise/All A are B)
- 30 is a multiple of ten. (True premise/C is A)
- Therefore, 30 is a multiple of 5. (True conclusion/Therefore, C is B.)