Premise: "A man laying on the roof attempting to rebuild it."\nHypothesis: "A man is trying to rebuild his own roof."\nDo we know that the hypothesis entailed by the premise?
Step-by-step reasoning:
it is not possible to tell
A man laying on the roof attempting to rebuild it does not imply that he is trying to rebuild his own roof.

.

Thus, the answer is it is not possible to tell