Another intellectually fashionable approach is to conduct small randomised trials to examine, say, the effectiveness of school-attendance incentives or immunisation campaigns.
How can theatre reliably examine, say, Cameron's cabinet when there are more old school ties among its members than on his front bench?
"The effects of warming on complex pollination networks are difficult to examine," says researcher Dr Karen Robbirt, from the Royal Botanic Gardens, Kew.
"They were allowed to bring expert witnesses and to cross-examine," said Ned Sullivan, the president of Scenic Hudson.
Eight different blood markers, including hemoglobin, are examined, said Robin Parisotto, a researcher from Australia.
She called over the supervisor, who closely examined said torso area.
"The remains will now be forensically examined," said a police spokesman.
"The whole antiterrorism effort is being examined," said Senator Bob Smith, a Middlesex County Democrat who is chairman the Environment Committee.
"Lots of scholars argue that the mandatory exclusionary rule ought to be re-examined," said David A. Sklansky, a law professor at the University of California, Berkeley.
"We are ready to help them only in giving them the numbers of complaints we have examined," said Mr. Rafat, the commission's spokesman.
