The possibility of various members of the Heat producing offensive onslaughts makes it impossible for an opponent to pinpoint just whom to cover at any given moment.
Bruce Ellis of the University of Arizona and W. Thomas Boyce of the University of California, Berkeley, who study genetics and child development, got the ball rolling by identifying gene sequences that can pinpoint an orchid child, whom they equate with "a flower of unusual delicacy and beauty".
The police said the list was not necessarily exhaustive, but reflected the names of people whom investigators could pinpoint as having been on the bridge at the time of the disaster.
He did not disclose that he had already done his "homework" on the two other targets: Kermit Roosevelt, a former C.I.A. official who had helped bring the Shah to power, in 1953; and Henry Kissinger, whom he had pinpointed because of Kissinger's involvement in the bombing of Cambodia and the coup against Salvador Allende, in Chile.
Mr. Morin chose the number 50 based on the research of Robin Dunbar, an anthropologist who tried to pinpoint the maximum number of people with whom others could have stable relationships.
As soon as you notice that a theft has occurred, make a major effort to gather information that can help you pinpoint when, where, and, if possible, around whom the theft took place.
"We can physically locate anyone who spreads a rumor on the Internet," said the salesman, whose company's services include monitoring online postings and pinpointing who has been saying what about whom.
In major airports that handle over half of originating passenger traffic, the agency uses what it calls in-line baggage systems that enable officials "to pinpoint exactly which bags are physically inspected and by whom," she said.
But it has been the repeated target of militants, some of whom suspect ISI agents of helping the Central Intelligence Agency pinpoint the coordinates for drone attacks on insurgents close to the Afghan border.
