I guarantee that it is physically impossible to fill a cardboard box with pure neutronium. Is it physically possible to get over 70 lbs of the stuff in there in a stable, shippable manner? I don’t know, and neither do you. It’s certainly far, FAR beyond the capability of any technology on Earth, but I guess it might maybe possibly not break the laws of physics. I can’t prove that though, and neither can you, so neither of us can actually prove the statement wrong.
I guarantee that it is physically impossible to fill a cardboard box with pure neutronium. Is it physically possible to get over 70 lbs of the stuff in there in a stable, shippable manner? I don’t know, and neither do you. It’s certainly far, FAR beyond the capability of any technology on Earth, but I guess it might maybe possibly not break the laws of physics. I can’t prove that though, and neither can you, so neither of us can actually prove the statement wrong.