“Well, people don’t call themselves, so calls between numbers indicate separate individuals. People who don’t like one another don’t talk for a long time. Just quick calls when they need to talk. Friends stay on the line for a long time. Single numbers that are connected to multiple names probably mean an alias. Somebody who carries one phone but goes by several names. Lets the calls go to voice mail, then figures out who they wanted and calls back. Or uses text so the voice isn’t a giveaway.”