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In a rational manner.

In an irrational manner. Boyle.

To mimic, as an ape imitates human actions; to imitate or follow servilely or irrationally. "How he apes his sire." Addison. The people of England will not ape the fashions they have never tried. Burke.

A term indicating the absence of any quality which might be naturally or rationally expected; -- called also privative term.

To wander in mind or intellect; to be delirious; to talk or act irrationally; to be wild, furious, or raging, as a madman. In our madness evermore we rave. Chaucer. Have I not cause to rave and beat my breast Addison. The mingled torrent of redcoats and tartans went raving down the valley to the gorge of Kiliecrankie.…

Talking irrationally and wildly; as, a raving lunatic. -- Rav"ing*ly, adv.

Governed by reason; being under influence of reason; thinking, speaking or acting rationally, or according to the dictates of reason; agreeable to reason; just; rational; as, the measure must satisfy all reasonable men. By indubitable certainty, I mean that which doth not admit of any reasonable cause of doubting. Bp.…

of the mind by which it is conscious of its own acts or states; the capacity for judging rationally, especially in view of a moral rule or standard. By reflection, . . . I would be understood to mean, that notice which the mind takes of its own operations, and the manner of them, by reason whereof there come to be ide…

Being in a healthy condition; not deranged; acting rationally; -- said of the mind.

result; final. Those ultimate truths and those universal laws of thought which we can not rationally contradict. Coleridge.