Make sure the ropes stay tight while we see if the thing can be moved."  He started to slip over the side, hanging by his fingertips.
He thought that he could tip it over with his body weight.
mnli hypothesis: He thought that he could tip it over with his body weight. premise: Make sure the ropes stay tight while we see if the thing can be moved."  He started to slip over the side, hanging by his fingertips.