Give me solution Exercise 2.7Show that every instance of the schema[Ø v (Y ^X)] →→ [(Ø v y) ^ (Ø V X)] is PL-valid.

PL(propositional logic):It states whether the statement is true or false. valid means true.

Answered: Exercise 2.7 Show that every instance…

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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Exercise 2.7 Show that every instance of the schema Ø v (Y^2)] → [Ov y) ^ (Ø v x)] is PL-valid.