> as any high false positive test, looses its usefulness when deployed on large scale, indiscriminately. Well of course anything mis-applied is probably bad. B

> as any high false positive test, looses its usefulness when deployed on large scale, indiscriminately. Well of course anything mis-applied is probably bad. But sometimes false positives can be a good thing. For example, in immunology, it's quite common to use cheap tests that have quite high false positives, but low false negatives to screen samples before applying more expensive, but more rigorous tests.