Q4. We want to verify that P → P3, P2 → P4, .. (P V P2) → (P3 V P4) is a valid argument.Fill in the justifications at each step.1. Р > Рз2. Р. — Ра3. Р. V P,4. ¬(P3 V P4)5. P.6. Рз7. Рз V РА8. (P3 V PA) ^ (¬(P3 V P4))9. P → ((P3 V Pa) ^ (¬(P3 V P4)))10. ¬P111. P212. РА13. Рз V Ра14. (P3 V P4) ^ (-¬(P3 V Pa))15. (¬(P3 V Pa)) –→ ((P3 V P4) ^ (¬(P3 V P4)))16. ¬(¬(P3 V P4))17. Рз V Ра18. (P, V P2) → (P3 V P4)

Answered: Q4. We want to verify that P → P3, P2 →…

Q4. We want to verify that P → P3, P2 → P4, .. (P V P2) → (P3 V P4) is a valid argument. Fill in the justifications at each step. 1. Р > Рз 2. Р, Ра 3. Р.V P. 4. ¬(P3 V PA)

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

Q4. We want to verify that P → P3, P2 → P4, .. (P V P2) → (P3 V P4) is a valid argument.
Fill in the justifications at each step.
1. Р > Рз
2. Р. — Ра
3. Р. V P,
4. ¬(P3 V P4)
5. P.
6. Рз
7. Рз V РА
8. (P3 V PA) ^ (¬(P3 V P4))
9. P → ((P3 V Pa) ^ (¬(P3 V P4)))
10. ¬P1
11. P2
12. РА
13. Рз V Ра
14. (P3 V P4) ^ (-¬(P3 V Pa))
15. (¬(P3 V Pa)) –→ ((P3 V P4) ^ (¬(P3 V P4)))
16. ¬(¬(P3 V P4))
17. Рз V Ра
18. (P, V P2) → (P3 V P4)

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