“The fish is fresh or I will not order it. The fish is fresh. Therefore, I will order it.” 2. “If she doesn’t get on the plane, she will regret it. She does not regret it. Therefore,  she got on the plane.”  The validity of an argument can be determined using a truth table. We proceed  as follows:  Write the argument in symbolic form.  Construct a truth table that shows the truth value of each premise and the truth  value of the conclusion for all combinations of truth values of the simple  statements.  If the conclusion is true in every row of the truth table in which all the premises are  true, the argument is valid. If the conclusion is false in any row in which all of the  premises are true, the argument is invalid.

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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  1. “The fish is fresh or I will not order it. The fish is fresh. Therefore, I will order it.” 2. “If she doesn’t get on the plane, she will regret it. She does not regret it. Therefore,  she got on the plane.” 

The validity of an argument can be determined using a truth table. We proceed  as follows: 

  1. Write the argument in symbolic form. 
  2. Construct a truth table that shows the truth value of each premise and the truth  value of the conclusion for all combinations of truth values of the simple  statements. 
  3. If the conclusion is true in every row of the truth table in which all the premises are  true, the argument is valid. If the conclusion is false in any row in which all of the  premises are true, the argument is invalid. 
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