地球上任意两个人之间平均要经过多少人才能扯上关系? 1967年,一位英国社会学家为了研究这个问题,在美国中西部进行了一项调查。他随机挑选了300人,要求他们把一个包裹送到一个陌生人那里去。寄送者知道收件人的姓名,职业等详细信息,但不准直接把包裹寄给收件人,而必须从自己认识的人中挑选一个最可能与收件人扯得上关系的,把包裹交给他,让他按同样规则继续转交。 On average, how many people passed between any two people on Earth would be linked? In 1967, a British sociologist conducted a survey in the midwestern United States to study the issue. He randomly picked 300 people and asked them to send a parcel to a stranger. The sender knows the recipient’s name, occupation and other details, but is not allowed to send the parcel directly to the recipient, but must know from the person you pick the one most likely to have relations with the recipient, Parcel to him, let him continue to be transmitted by the same rules.