Instruct: Classify a given review as either positive or negative.
Query: Posner's fairy tale

As a film maker I learned years ago that the camera does not lie. Namely, the Zapuder film. The fatal shot that struck the President's right temple could've only come from one place, the grassy knoll to the right front of JFK. Case Closed! Posner's book is a silly attempt to justifiy the Warren Commission report. Research his background and you can draw your own conclusion about his motivations.