Feedback
In biology, feedback refers to a response within a system (molecule, cell, organism, or population) that influences the continued activity or productivity of that system. In essence, it is the control of a biological reaction by the end products of that reaction. Similar usage prevails in mathematics, particularly in several areas of communication theory. In every instance, part of the output is fed back as new input to modify and improve the subsequent output of a system. The importance of feedback mechanisms has also been pointed out by Norbert Wiener. He theorized that all intelligent behavior is the result of feedback mechanisms and that they could therefore contribute to the creation artificial intelligence.
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