"The Patriot Act allows Federal agents to look at public and university library patron circulation records, books checked out, magazines consulted, all subject to government scrutiny. There used to be a time in this country when we were worried whether our young people knew how to read. Now some in our government are more worried that government agents be able to find out what people are reading."

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I am afraid that those comments go back to the late 80's. At that time I was a skeptic - the argument based on Koch's postulates to try to distinguish between cause and association. Today I would regard the success of the many antiviral agents which lower the virus titers (to be expected) and also resolve the failure of the immune system (only expected if the virus is the cause of the failure) as a reasonable proof of the causation argument .

— Walter Gilbert