## Principles of Artificial IntelligenceA classic introduction to artificial intelligence intended to bridge the gap between theory and practice, Principles of Artificial Intelligence describes fundamental AI ideas that underlie applications such as natural language processing, automatic programming, robotics, machine vision, automatic theorem proving, and intelligent data retrieval. Rather than focusing on the subject matter of the applications, the book is organized around general computational concepts involving the kinds of data structures used, the types of operations performed on the data structures, and the properties of the control strategies used. Principles of Artificial Intelligenceevolved from the author's courses and seminars at Stanford University and University of Massachusetts, Amherst, and is suitable for text use in a senior or graduate AI course, or for individual study. |

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Page 198

that node in the

no ancestors in the

representation of a wff is that the set of clauses into which that wff could have

been ...

that node in the

**graph**labeling the entire fact expression , the root node . It hasno ancestors in the

**graph**. An interesting property of the**AND / OR graph**representation of a wff is that the set of clauses into which that wff could have

been ...

Page 199

Usually , we draw our

upside down . ” Later we also use

these are displayed in the usual manner , “ rightside up . " When we represent

wffs by ...

Usually , we draw our

**AND / OR graph**representations of fact expressions “upside down . ” Later we also use

**AND / OR graph**representations of goal wffs ;these are displayed in the usual manner , “ rightside up . " When we represent

wffs by ...

Page 206

Now we consider the process of applying a rule of the form ( L W ) to an

might contain variables . The rule is applicable if the

Now we consider the process of applying a rule of the form ( L W ) to an

**AND /****OR graph**, where L is a literal , W is a wff in AND / OR form , and all expressionsmight contain variables . The rule is applicable if the

**AND / OR graph**contains a ...### What people are saying - Write a review

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### Contents

PROLOGUE | 1 |

PRODUCTION SYSTEMS AND AL | 17 |

SEARCH STRATEGIES FOR | 53 |

Copyright | |

12 other sections not shown

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### Common terms and phrases

achieve actions algorithm AND/OR graph answer applied arcs Artificial Intelligence assume attempt backward block called chapter clauses CLEAR(C complete component condition conjunction consider consistent contains control strategy corresponding cost database deduction Deleters described direction discussed evaluation example expression F-rule fact Figure formula function given global database goal goal wff HANDEMPTY heuristic implication important initial instance involves JOHN knowledge labeled language literals logically match methods move namely node Note obtained occur ONTABLE(A operation path possible precondition predicate calculus problem procedure production system proof prove quantified reasoning refutation represent representation resolution resolvent result robot rule satisfied selected sequence shown in Figure simple solution graph solve specify statement step STRIPS structure subgoal substitutions successors Suppose symbols termination theorem unifying unit University variables