Provide proofs or disproofs of the following arguments (use conditional proof and 4 quantifier rules like universal instantiation, existential generalization, etc.). All crows are black.                                           John is black.                                                     Therefore, John is a crow.

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
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Provide proofs or disproofs of the following arguments (use conditional proof and 4 quantifier rules like universal instantiation, existential generalization, etc.).

  • All crows are black.                                          
  • John is black.                                                    
  • Therefore, John is a crow.    
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