I thought the whole premise was utterly absurd. My recollection is a bit fuzzy, but something 2D cannot stop waves or matter. And the nano-rope thing that cuts

I thought the whole premise was utterly absurd. My recollection is a bit fuzzy, but something 2D cannot stop waves or matter. And the nano-rope thing that cuts a ship without cutting the poles it's attached to or slicing through the hands of the people that handle it is also too far-fetched, while being crucial to the story. Needless to add, I didn't like the book, at all.