You run into someone who in the past made some personal sacrifices in order to help you get on your feet during a financial struggle. Now, society has completely collapsed and he comes to your door begging for help. To give him the bare minimum that he needs, your resources would be depleted by 50%, and you don't know if and when you'll be able to replenish your supplies. Would you be able to do for him what he did for you by giving him half of your supplies?