A. 'A' is better.
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Q. If a shomer was negligent while the owner was with him is he exempt ?
A. There is a dispute & we pasken yes. See Tosfos.
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Q. What are the 2 points that we conclude that we refute Rav Hamnuna ?
A. 1- even if the owner was working someplace else for the borrower there is an exemption.
2- and he does not need to be involved the whole time.
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