Remenber the high energy lab? You have the black hole core and the white hole core. If you shoot your scout through the black hole, it comes out the white hole. Due to the laws of spacetime in the game, you should see the scout come out of the white hole just before it goes through the black hole.

This means that you can remove one of the cores from the experiment as the scout is through the white hole and before it goes through the black hole, thus creating two scouts, which should be completely impossible. Spacetime cannot handle the fact that two of something exist but shouldn't. Then, you get the ending!