Documents contain human-understandable information Because this
information was designed to be easily understood by a human (such as text, sounds, and images), it is often difficult for a computer to figure it out.
This communications gap between man and machine is an imposing obstacle
to technology. No one wants to re-express human knowledge in computer-understandable
terms unless absolutely necessary. We need to make
computers understand documents. The computer solution is to create the
illusion of understanding, without actually doing any comprehension