It's a stimulating exercise to think of questions to which no human today knows the answers, but where a correct answer would immediately be recognized as such. It's even more challenging to formulate such questions in fields other than mathematics. Perhaps we should hold a contest and collect the best responses in "Ten Questions to Ask an Alien."The connection to aliens stems from how one might test claims from individuals who say they have contact with extra-terrestrial visitors, who are presumably far more scientifically and technologically advanced than we are. The examples given are proof of Fermat's Last Theorem or Goldbach's conjecture, both mathematics problems (the former no longer being eligible, as it has since been solved).
I have no prize to offer for such a contest, but what are some other (preferably non-mathematics) questions we could include on such a list?