"Artificial Inanity" as Neal Stephenson called it in Anathem: “Well, bad crap would be an unformatted document consisting of random letters. Good crap would be

"Artificial Inanity" as Neal Stephenson called it in Anathem: “Well, bad crap would be an unformatted document consisting of random letters. Good crap would be a beautifully typeset, well-written document that contained a hundred correct, verifiable sentences and one that was subtly false. It’s a lot harder to generate good crap. At first they had to hire humans to churn it out. They mostly did it by taking legitimate documents and inserting errors-swapping one name for another, say. But it didn’t really take off until the military got interested.”