Once he was sure of that, he used a scrap of the sky to insulate the second little sun that would control the first sympathetically from the track.
After he was absolutely certain, he snipped off a piece of sky to insulate the second sun, then turned his attention to the third.
mnli hypothesis: After he was absolutely certain, he snipped off a piece of sky to insulate the second sun, then turned his attention to the third. premise: Once he was sure of that, he used a scrap of the sky to insulate the second little sun that would control the first sympathetically from the track.