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AIMA-Java Core Algorithms from the book Artificial Intelligence a Modern Approach 3rd Ed.

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package aima.core.learning.reinforcement;

import aima.core.agent.Percept;

/**
 * Artificial Intelligence A Modern Approach (3rd Edition): page 830.

 * 

 * Our framework for agents regards the reward as part of the input percept, but
 * the agent must be "hardwired" to recognize that part as a reward rather than
 * as just another sensory input.
 * 
 * @author Ciaran O'Reilly
 * @author Ravi Mohan
 */
public interface RewardPercept extends Percept {
	/**
	 * 
	 * @return the reward part of the percept ('hardwired').
	 */
	double reward();
}