prove out

Verb

 * 1)  To turn out to be feasible, accurate, true, satisfactory, as expected, hoped, stated, etc.
 * 2)  To demonstrate the feasibility of; to show or be shown to be feasible, accurate, true, satisfactory, as expected, hoped, stated, etc.
 * 3) * 2007 April 16, Les Johnson, Nell Boyce (reporter), “Space Tethers: Slinging Objects in Orbit?”, Morning Edition, National Public Radio
 * Not that we’re afraid of things new. It’s just, before you put ’em on a system, they’ve gotta be demonstrated and proven and you’ve gotta have a lot of confidence in ’em. And we’re still in the stages where we're proving this out.