About Deaf-Blindness > What is Deaf-Blindness. Deaf-blindness is a low incidence disability and within this very small group of children there is great variability. Many children who are deaf-blind have some usable vision and/or hearing. The majority of children who are deaf-blind also have additional physical, medical and/or cognitive problems.
Introduction-David Hume. The Philosopher David Hume is famous for making us realize that until we know the Necessary Connection / cause of things then all human knowledge is uncertain, merely a habit of thinking based upon repeated observation (induction), and which depends upon the future being like the past.
Although Voltaire was a deist, he still had a very naturalistic worldview. He had a deep regard for science and its importance in promoting rational thought over superstition. Since he still believed in a supernatural creator, he did not subscribe to the emerging idea that living organisms could spontaneously generate from non-living matter. Still, Voltaire felt that basing your beliefs on empirical evidence was the antidote to religiosity and the dangerous authority it can create.