Initially looked difficult. Managed it in less than 5 minutes (maybe only 3). Perhaps a DM ***.
Today's "2 star" took about 15 seconds (brain faster than pen). I don't know what it would take to be a 1-star.Not sure I have either. Usually only get the DM on Saturday (for the TV pullout and the extra quizzes), so I'm only aware of the ones the rest of the week through your postings.
It's like teleportation, though, or cloning. The original has no link of continuity of consciousness to its predecessor. A teleported person would be a different person, but with the same memories. If a consciousness were cloned into a machine, there is no way the machine would be a continuation of a person.I know of no way to prove this has not already happened.