Everybody has a theory, Judge Nadir has come to believe. A conviction, dogged and tenacious, which they refuse to surrender. This is the American way. We have home remedies we swear by, superstitions we will not renounce. We are optimists or pessimists, trusting or suspicious. We confirm our theories online. The internet, invented to “democratize information,” has turned out, instead, to be a tool of self-affirmation. Whether you believe you’re suffering from chronic fatigue syndrome or that 9/11 was an inside job, the World Wide Web exists to tell you you’re right.