reason

/ˈɹiːzən/

noun

A cause:
Rational thinking (or the capacity for it); the cognitive faculties, collectively, of conception, judgment, deduction and intuition.
"Mankind should develop reason above all other virtues."
Something reasonable, in accordance with thought; justice.

verb

To deduce or come to a conclusion by being rational
To perform a process of deduction or of induction, in order to convince or to confute; to argue.
To converse; to compare opinions.

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