anyone in their right mind

anyone in their right mind

Anyone of a sound, rational mind. Usually used to set up a context in which any sane person would or could do, say, or think a certain thing. Anyone in their right mind can see that poverty affects the entire world.
See also: anyone, mind, right
References in classic literature ?
Her temper being naturally good, she was never violent or morose, but from constant indulgence, and habitual scorn of reason, she was often testy and capricious; her mind had never been cultivated: her intellect, at best, was somewhat shallow; she possessed considerable vivacity, some quickness of perception, and some talent for music and the acquisition of languages, but till fifteen she had troubled herself to acquire nothing;--then the love of display had roused her faculties, and induced her to apply herself, but only to the more showy accomplishments.
She is however quite unable to apply herself steadily to any kind of work.
That she will faithfully apply herself to the acquisition of those accomplishments, upon the exercise of which she will be ultimately dependent.
I don't know how anyone in their right mind could support Dereck Chisora, a convicted woman beater.