Rational
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Look up rational in Wiktionary, the free dictionary.
Rational may be:
- pertaining to rationality
- acting according to the philosophical principles of rationalism
- a mathematical term for certain numbers; the rational numbers
- A rational function, a mathematical function which can be written as the ratio of two polynomial functions.
- the software company Rational Software; now owned by IBM, and formerly Rational Software Corporation
- the most central paradigm of Rational-Emotive Therapy
- Rational, one of the four temperaments according to the Keirsey Temperament Sorter.
- A common misspelling of "rationale".

