# Therefore sign

∴ | |
---|---|

Therefore sign | |

In Unicode | U+2234 ∴ THEREFORE (∴, ∴, ∴) |

Related | |

See also | Similar signs (below) |

In logical argument and mathematical proof, the **therefore sign**, **∴**, is generally used before a logical consequence, such as the conclusion of a syllogism. The symbol consists of three dots placed in an upright triangle and is read *therefore*. While it is not generally used in formal writing, it is used in mathematics and shorthand.

## History

According to

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## Example of use

- All gods are immortal.
- Zeus is a god.
- ∴ Zeus is immortal.

and in mathematics

*x*+ 1 = 10- ∴
*x*= 9

## Other uses

In meteorology, the 'therefore' sign is used to indicate 'moderate rain' on a station model; the similar typographic symbol asterism (⁂, three asterisks) indicates moderate snow.^{[2]}^{[3]}

### Freemasonry

In

^{[4]}

## Unicode

The symbol has a Unicode code point at U+2234 ∴ THEREFORE (∴, ∴, ∴). See Unicode input for keyboard-entering methods.

## Similar signs

∵ ஃ ⁂ ⛬ | |
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Similar signs | |

In HISTORIC SITE |

The inverted form, **∵**, known as the **because sign**, is sometimes used as a shorthand form of "because".

The character ஃ (visarga) in the

An

The graphically identical sign ∴ serves as a

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In

## See also

- Q.E.D.
- List of mathematical jargon

## References

- ^ ISBN 978-1-61640-571-7.
**.****^**"Station Model Information for Weather Observations".*National Weather Service Weather Prediction Center*. Retrieved 2019-07-16.**^**Mackey, Albert Gallatin (1925).*An Encyclopedia of freemasonry and its kindred sciences, comprising the whole range of arts, sciences and literature as connected with the institution*(reprint ed.). Masonic History Co. p. 2.- HISTORIC SITE
**^**"Forklaringstegnet: en savnet del av det typografiske repertoar?" [Explanation: A missing part of the typographical repertoire?].*www.typografi.org*(in Norwegian). Retrieved 2018-08-15.