I DID NOT WRITE THIS. IT IS AN EXCERPT FROM Cory Doctorow’s novel Little Brother. I really enjoyed this passage and the entire novel in general. It is technically a young adult novel, but I think anyone bored or curious should definitely check it out. I read it in a day this Summer because I couldn’t put it down. If you ever decide to do something as stupid as build an automatic terrorism detector, here’s a math lesson you need to learn first. It’s called “the paradox of the false positive,”…