# Logical disjunction

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**Logical disjunction**, also called **logical alternation**, is an operation on two logical values, typically the values of two propositions, that produces a value of *false* if and only if both of its operands are false.

The truth table of \(p ~\operatorname{OR}~ q,\) also written \(p \lor q,\!\) appears below:

\(p\!\) | \(q\!\) | \(p \lor q\) |

\(\operatorname{F}\) | \(\operatorname{F}\) | \(\operatorname{F}\) |

\(\operatorname{F}\) | \(\operatorname{T}\) | \(\operatorname{T}\) |

\(\operatorname{T}\) | \(\operatorname{F}\) | \(\operatorname{T}\) |

\(\operatorname{T}\) | \(\operatorname{T}\) | \(\operatorname{T}\) |

## Syllabus

### Focal nodes

### Peer nodes

- Logical Disjunction @ InterSciWiki
- Logical Disjunction @ MyWikiBiz
- Logical Disjunction @ Subject Wikis
- Logical Disjunction @ Wikiversity
- Logical Disjunction @ Wikiversity Beta

### Logical operators

Template:Col-breakTemplate:Col-breakTemplate:Col-end### Related topics

- Propositional calculus
- Sole sufficient operator
- Truth table
- Universe of discourse
- Zeroth order logic

### Relational concepts

### Information, Inquiry

### Related articles

- Differential Logic : Introduction
- Differential Propositional Calculus
- Differential Logic and Dynamic Systems

- Prospects for Inquiry Driven Systems
- Introduction to Inquiry Driven Systems
- Inquiry Driven Systems : Inquiry Into Inquiry

## Document history

Portions of the above article were adapted from the following sources under the GNU Free Documentation License, under other applicable licenses, or by permission of the copyright holders.

- Logical Disjunction, InterSciWiki
- Logical Disjunction, MyWikiBiz
- Logical Disjunction, Wikinfo
- Logical Disjunction, Wikiversity
- Logical Disjunction, Wikiversity Beta
- Logical Disjunction, Wikipedia