There are three human beings on a raft out in the sea. They are all rather the same; each is your average Joe, a good guy who does his work and gets along well with those around him.
This raft however is made of a material that doesn't have enough buoyancy to be able to keep all three men afloat, evident by its slow descent into the water the longer the three men stay on it. The water below is icy cold and the temperature combined with the moisture is enough to kill a man after hardly a dozen minutes of exposure (guy becomes unconscious and then drowns/dies of hypothermia).
The raft does however, have the buoyancy to support two guys.
Should one be forsaken? Simple moral question, there is no right or wrong. But this is mainly a test to see what you would do.
There is no other option. You either forsake this man or have him hang on with the rest. You may give reasoning and you may debate other's reasoning.