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.
In epistemology, rationalism is the view that regards reason as the chief source and test of knowledge or any view appealing to reason as a source of knowledge or justification. More formally, rationalism is defined as a methodology or a theory in which the criterion of the truth is not sensory but intellectual and deductive. In an old controversy, rationalism was opposed to empiricism, where the rationalists believed that reality has an intrinsically logical structure.