Transcription of 7 LOGICAL AGENTS - Artificial Intelligence: A Modern Approach
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7 LOGICALAGENTSI nwhich wedesignagentsthatcanformrepresentations oftheworld,usea pro-cessof inferenceto derivenew representationsabouttheworld, therepre-sentationofknowledgeandthereaso ningprocessesthatbringknowledgeto life ,it seems, enablesuccessfulbehaviorsthatwouldbevery hardto achieve have seenthatknowledgeofactionoutcomesenables problem-solvingagentstoperformwellincomp lex reflex ,however, ,butdoesnotknowinany usefulsensethatnopiececanbeontwo , ,thisprocesscanbequitefarremovedfromthen eedsofthemoment aswhena mathematicianprovesa theoremoranastronomercalculatestheearth s ,aphysiciandiagnosesa patient thatis,infersa diseasestatethatis notdirectlyobservable priortochoosinga ,andsomeis itsinsidethephysician s head,it ,namely, theinten-tionofthespeaker.
7.1 KNOWLEDGE-BASED AGENTS KNOWLEDGE BASE The central component of a knowledge-based agent is its knowledge base, or KB. Informally, SENTENCE a knowledge base is a set of sentences. (Here “sentence” is used as a technical term. It is related but is not identical to the sentences of English and other natural languages.) Each sen-
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