Use a truth tree (3x)Fx, ~(3x XE
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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Question
Transcribed Image Text:D.
Use a truth tree to determine whether the following argument form is valid or has a counter-model.
(3x)Fx, ~(3x)(Fx Gx), (3x)Gx"
Select one or more:
a. valid
b. It has no counter-model.
c. It has a counter-model.
O d. not valid
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