Pinocchio has driven two nails into the board to secure them, so that if one of them falls, the other nail will prevent him from falling.(Maybe he wanted to stand on the board)The fox claims that he can pass the rope through these two nails so that if either of them falls, the rope will be released and Pinocchio will fall to the ground; Do you think such a thing is possible?

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    $\begingroup$ Related, related. I haven't found an exact duplicate yet. $\endgroup$ – bobble Jan 6 at 20:15
  • $\begingroup$ Admittedly you have to think of the rungs as nails and part of the loop contains the shelf but I think it's essentially the same. $\endgroup$ – hexomino Jan 6 at 20:51

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