Imagine a man has fallen into a tiger cage. The tiger specimen is in danger of extinction.
- Kill the tiger and save the man.
- Do nothing and let the tiger kill the man.
By killing the tiger, you are endangering the existence of the tiger species.
What are arguments to choose to save the man?
I don´t feel that saying "save the man because he is human" is the best argument.
Could be a better one: "save the human because he could save you in another dangerous situation, and the tiger will never save you (except by chance)?