Contoh lainnya misal, kalau Anda adalah perusahaan telepon, Anda bisa tahu siapa yang jadi pusat jaringan, Anda minta ke orang- orang itu, " Maaf, bisa SMS- kan demam Anda setiap hari?
Or another example would be, if you're a phone company, you figure out who's central in the network and you ask those people, " Look, will you just text us your fever every day?QED QED