SUE was waiting for a bus with her 10-year-old half-sister. A plump gypsy, claiming to be from Central Europe, appeared with a seemingly well-fed baby on her hip. She went up and down the queue displaying a card that bore the words: 'I cannot afford food for my baby. Please help me.' Should Sue have given the woman money or, if she refused on principle, what explanation should she have given her half-sister, who was touched by the woman's appeal?

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