Intelligent Agents

An agent perceives its environment through sensors and acts on this environment using effectors percept-an agents perceptual input at any given instant percept sequence-complete history of what the agent has perceived An agent is anything that can be viewed as perceiving its environment through sensors and acting upon that environment through actuators • Human agent: eyes, ears, and other organs for sensors; hands, legs, mouth, and other body parts for actuators • Robotic agent: cameras and infrared range finders for sensors; various motors for actuators Rational Agent-do the right thing strive for success How does it do this? Evaluation-how do we know it succeeded Use a performance measure-domain dependent measure and should be objective What is rational at any given time depends on 4 things 1) performance measure defines degree of success 2) percpet sequence-what agent has perceived so far 3) knowledge about environment 4) action agent performs What is the difference between omniscience and rationality? omniscience-agent knows the actual outcome of its actions. in reality omniscience is impossible rationality concerned with expected success (what is usual) given current perception. Not perfection. What is the percept sequence to date? Not what will happen in the future.