Defining Artificial Intelligence
The phrase Artificial Intelligence I, which was coined by John
McCarthy three decades ago, evades a concise and formal definition to
date. One representative definition is pivoted around the comparison of
intelligence of computing machines with human beings . Another
definition is concerned with the performance of machines which
"historically have been judged to lie within the domain of intelligence"
. None of these definitions or the like have been universally accepted,
perhaps because of their references to the word "intelligence", which
at present is an abstract and immeasurable quantity. A better definition
of artificial intelligence, therefore, calls for formalization of the
term "intelligence". Psychologist and Cognitive theorists are of the
opinion that intelligence helps in identifying the right piece of
knowledge at the appropriate instances of decision making. The phrase
"artificial intelligence" thus c bane defined as the simulation of human
intelligence on a machine, so make the machine efficient to identify
and use the right place of "Knowledge" at a given step of solving a
problem. A system capable of planning and executing the right task at
the right time is generally called rational . Thus, AI alternatively may
be stated as a subject dealing with computational models that can think
and act rationally 1, 2, 3, 4. A common question then naturally arises:
Does rational thinking and acting include all possible characteristics
of an intelligent system? If so, how does it represent behavioral
intelligence such as machine learning, perception and planning? A little
thinking, however, reveals that a system that can reason well must be a
successful planner, as planning in many circumstances is part of a
reasoning process. Further, a system can act rationally only after
acquiring adequate knowledge from the real world. So, perception that
stands for building up of knowledge from real world information is a
prerequisite feature for rational actions. One step further thinking
envisages that a machine without learning capability cannot possess
perception. The rational action of an agent (actor), thus, calls for
possession of all the elementary characteristics of intelligence.
Relating artificial intelligence with the computational models capable
of thinking and acting rationally, therefore, has a pragmatic
significance.
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