_{Here are two explorers. Let them be Penelope Pessimist and Ophelia Optimist. They are exploring some mountainous regions, when they become suddenly aware of a bear in the distance, a bear big and hungry and intent upon feeding - feeding upon them.}

_{The bear heads in their direction, picking up speed, anticipating a tasty explorer breakfast.} 

_{‘We'd better run for it,' urges Ophelia Optimist.}

_{‘What's the point?' sighs Penelope Pessimist in despair at the bear. ‘There's no way we can outrun a bear.'}

_{‘No need to do that,' smirks Ophelia Optimist. ‘No need for us to outrun the bear - just for me to outrun you.'}

_{And with that, she was off.}

_{* * *}

_{What are we morally allowed to do to save our lives?  Presumably Ophelia would not be permitted morally to trip up Penelope...}

I raise this question because in many parts of the world we do need to protect our lives, yet in doing so, we may endanger others.