While there will be considerable processing going on at the preconscious level, there will be considerable conscious processing going on during activation, especially after an incubation period.
Over and over I've heard from people who said that the PhotoReading whole mind system helped them with philosophical and scientific reading because insights the system released. I remember a chemist saying about ten years ago, "Through my old way of reading I never had the richness of understanding that I get with PhotoReading. I've been able to make connections and correlations that would have eluded me..."
As far as how the mind treats false information, keep on your toes. It is the same as with regular reading. Garbage in, garbage out. One of the biggest benefits I receive from previewing/postviewing is determining the credentials of the author and recency of the book.