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people. c) Ani is the dean. d) All Deans are professors. e) All professors consider the dean a friend or don’t know him. f) Everyone is a friend of someone. g) People only criticize people that are not their friends. h) Andi criticized Ani.

people. c) Ani is the dean. d) All Deans are professors. e) All professors consider the dean a friend or don’t know him. f) Everyone is a friend of someone. g) People only criticize people that are not their friends. h) Andi criticized Ani.

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Artifical Intelligence 

Suppose you are given some facts in First-Order Logics:

  1. a) Andi is a professor
  2. b) All professors are people.
  3. c) Ani is the dean.
  4. d) All Deans are professors.
  5. e) All professors consider the dean a friend or don’t know him.
  6. f) Everyone is a friend of someone.
  7. g) People only criticize people that are not their friends.
  8. h) Andi criticized Ani.

Prove that: Ani is not Andi’s friend

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