He understood the necessary strategy of his campaign too well to suppose that he could startle Lily into acquiescence.

Safety: A secure home, public and hospital environment, without access to suicidal means is a necessary strategy in suicide prevention.

Judging from the number of people in the audience who were checking their handhelds during various presentations, it's a necessary strategy.

And while this necessary strategy delivered victory against the man who stood across from him, that more cunning foe hunkered in the shadows.