Because now, with this idea we can take a random sample of people, have them nominate their friends, those friends would be more central, and we could do this without having to map the network.
このアイデアをもとにすれば ネットワークの図がなくても 集団からランダムに誰かを選び 友人を挙げてもらって 中央寄りの人の選出ができるからです