# Difference between revisions of "Higher Order Logic"

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{{Reference_Definition| A logic is called higher order if it allows sets to be quantified or if it allows sets to be elements of other sets. Higher Order Logics becomes relevant when dealing with modalities, such as certainty or necessity. | [http://www.cas.mcmaster.ca/~lawford/2F03/Notes/HOL.pdf McMaster University web site]}} | {{Reference_Definition| A logic is called higher order if it allows sets to be quantified or if it allows sets to be elements of other sets. Higher Order Logics becomes relevant when dealing with modalities, such as certainty or necessity. | [http://www.cas.mcmaster.ca/~lawford/2F03/Notes/HOL.pdf McMaster University web site]}} | ||

## Revision as of 17:08, 16 February 2012

**Definition: **
**Reference Definition:** A logic is called higher order if it allows sets to be quantified or if it allows sets to be elements of other sets. Higher Order Logics becomes relevant when dealing with modalities, such as certainty or necessity. (**[[source:: McMaster University web site]])**

**See also:** First Order Predicate Logic
**Category: ** Information Model