Rationality n. : The quality or state of being rational; agreement with reason; possession of reason; due exercise of reason; reasonableness.

Example:
Is logic, mathematics and Rationality fundamental to the universe?

Taxonomy
rationality, rational, practical rationality, beliefs, behavior, free encyclopedia, motive, Oxford University Press, emotion, interpretation, explanation, Eagleton, Simons, Hawkins, affective, Etzioni, humans, Jesús Mosterín.

Defination from the web:
rationality and reason are the key methods used to analyze the data gathered through systematically gathered observations. ... In this concept of "rationality", the individual's goals or motives are taken for granted and not made subject to criticism, ethical or otherwise. ...