Let's make things more complicated
The following is adapted from a series of discussions and thought experiments between myself and LKR.
Thought Experiment 1
Locate:
What if an alien took everyone from earth except you and one other person? You don't know who they are or where, but you are charged with finding them. If you succeed, everyone will be restored.
How would you go about survival and eventually locating and reaching the other person?
Thought Experiment 2
Friends:
What if everyone disappeared except you and your friends? Who would be left?