This compels humans with a certain instinct for honesty to feel that the Brain can be treated as a partner.

In those zombi minds remained certain instincts, which The Shadow recognized from his own experience.

He saw only the agony in his friend's eyes, and he acted on it, with sure and certain instinct.

Though it nearly choked her, Robbie swallowed certain feminist instincts.

But, as I have learned in the last few months, certain old instincts lurk just beneath the surface.

Still, the pathetic creatures had certain instincts that might be useful.

He knew it with a certain instinct that nobody else had.

Yet there were certain instincts one developed and came to recognize.

My reaction concerns certain more basic human instincts - mortality, love, honor - that are really at the center of the poem.

Sean had the philanderer's sure and certain instinct, perhaps he had inherited it from his father.