Directions: For each proof, you must include (i.e., write) the premises in that proof. I do not want to see any proofs without premises. YOU CANNOT USE CONDITIONAL PROOF (CP), INDIRECT PROOF (IP), and ASSUMED PREMISES (A). Additionally, use only the 18 rules of inference found in the text and in the notes. You will lose points if you use any of the inference rules Resolution, Contradiction, Transposition, Idempotence and Identity.

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
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Directions: For each proof, you must include (i.e., write) the premises in that proof. I do not want to see any proofs without premises. YOU CANNOT USE CONDITIONAL PROOF (CP), INDIRECT PROOF (IP), and ASSUMED PREMISES (A). Additionally, use only the 18 rules of inference found in the text and in the notes. You will lose points if you use any of the inference rules Resolution, Contradiction, Transposition, Idempotence and Identity.
(13) 1.
2.
(Dv C)
CD (ADB)
3. A = B/.. ~ A
Transcribed Image Text:(13) 1. 2. (Dv C) CD (ADB) 3. A = B/.. ~ A
(11) 1. Av B
2. C
3. (A C) D
4.
~(~ F. B) /:. D v F
2
Transcribed Image Text:(11) 1. Av B 2. C 3. (A C) D 4. ~(~ F. B) /:. D v F 2
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