Reason

understanding reasoning intellect mind logic judgment comprehension wisdom sense brains brain discernment rationality ratiocination acumen apprehension deduction inference intellection speculation generalization rationalism reasonableness rationalization sensibleness lucidity argumentation dialectics sanity soundness sound mind mentality wit limits bounds moderation propriety senses marbles saneness

purpose aim end object goal design motive idea motivation incentive cause consideration basis grounds target inducement rationale antecedent determinant impetus argument occasion proof warrant root spring wherefore why why and wherefore whyfor ulterior motive

excuse justification explanation rationale account defense vindication apology argument ground case cover idea notion proof why exposition rationalization apologia wherefore the whole idea why and wherefore whatfor whyfor song and dance sour grapes

think figure out solve conclude decide reflect examine study deduce infer suppose contemplate deliberate rationalize speculate cerebrate cogitate resolve gather work out deduct generalize draw conclusion think through make out draw from adduce philosophize ratiocinate syllogize thresh out