Justify each step in the proof sequence ofA' ABA[B→(A V C)]→C5. (A')' V C1. A'2. B6. A' →C3. B→ (A V C)7. C4. A VC

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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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Justify each step in the proof sequence of
A' ABA[B→(A V C)]→C
5. (A')' V C
1. A'
2. B
6. A' →C
3. B→ (A V C)
7. C
4. A VC

Expert Solution

Step 1

Modus Ponens:-

In Western philosophy, modus ponens is a valid argument structure because the truth of the premises ensures the validity of the conclusion; in contrast, affirming the consequent is a weak structure since the validity of the premises does not ensure the validity of the conclusion.

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