I love the discussion about life and death and the truth. Ultimately, the goal of philosophy is to find the universal truth whether it may or may not exist, is it not? Once we come up with something that is not necessarily the truth but something we are content about without room for any more doubt, that's probably the end of our journey.
How to save last human: Click door, click tissue paper, click toilet, click flush, click bath tub faucet, click cabinet, click drawer, click socket, click faucet (the other one), click water, click gun, click gun again 5 times and the visitor dies!