Davak writes: In many ways finding the small amount of terrorists within the United States is like screening a population of people for a rare disease. A physician explains why collecting excessive data is actually dangerous. Each time a test is run, the number of people incorrectly identified quickly dwarfs the correct matches. Just like in medicine, being incorrectly labelled has seriousconsequences.
What is wanted is not the will to believe, but the will to find out,
which is the exact opposite.
-- Bertrand Russell, "Skeptical Essays", 1928