Show that each argument is not valid by finding a truth assignment of the variables that makes the hypothesestrue, but the conclusion false. (Hint: fill out a truth table if you have trouble finding an assignment.)PVr(a)P^r

Step 1: Hypotheses: (p /\ r)Conclusion: (p \/ r)

Answered: Show that each argument is not valid by…

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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Show that each argument is not valid by finding a truth assignment of the variables that makes the hypotheses true, but the conclusion false. (Hint: fill out a truth table if you have trouble finding an assignment.) PVr (a) P^r