Daniel Kish: Blind Vision
Reduced sensitivity restricts the informational input but not the brain potential prepared to receive and process it. After the brain is deprived of sensory input it begins to reconstruct the missing data from the available information. The replaced information is a brain-generated deduction that lacks direct sensory feedback. Inferences enforced by informational deficit are only partially confirmed by senses. Their verification mostly relies on unspecific substitutional sensations or on intellectual concepts. The simulated data is conceptual rather than factual. Still, it incorporates in perception as a fact.