However limited the application, the existing technology must be implemented. Balls and strikes? No. Safe or out? No. But fair or foul? Home run or not? Yes and yes. And didn't we see all we needed to know in the Jermaine Dye did-the-ball-hit-the-bat-or-didn't-it incident? Suppose that took place with the score tied, two outs and the bases loaded in the bottom of the ninth inning of a World Series Game 7? If allowed to stand, the game and Series would have been over. Unjustly. And we could have corrected it. How can anyone object to replay in that context? We don't have to get it right the first time out. We'll have to experiment a while. But we must get started.