(4th-March-2020)
From today, we are talking about the agent of AI. Here is agent features.
An agent is something that acts in an environment.
An agent can, for example, be a person, a robot, a dog, a worm, the wind, gravity, a lamp, or a computer program that buys and sells.
Purposive agents have preferences. They prefer some states of the world to other states, and they act to try to achieve the states they prefer most. The non-purposive agents are grouped together and called nature. Whether or not an agent is purposive is a modeling assumption that may, or may not, be appropriate. For example, for some applications it may be appropriate to model a dog as purposive, and for others it may suffice to model a dog as non-purposive.
If an agent does not have preferences, by definition it does not care what world state it ends up in, and so it does not matter what it does. The only reason to design an agent is to instill it with preferences - to make it prefer some world states and try to achieve them. An agent does not have to know its preferences.
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