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Which of the following is not tautology? O a. (p or q) and (q or p) O b. (P and q) → (p or ~p) (p or -p)-((p or q) and (-p)) O d. P or -p e. p or -q or p

Which of the following is not tautology? O a. (p or q) and (q or p) O b. (P and q) → (p or ~p) (p or -p)-((p or q) and (-p)) O d. P or -p e. p or -q or p

Database System Concepts
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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Which of the following is not tautology? -(p or q) and (q or p) O b. (p and q) → (p or ~p) (p or -p)-((p or q) and (-p)) Oc. O d. P or -p O e. p or -q or p
Transcribed Image Text:Which of the following is not tautology? -(p or q) and (q or p) O b. (p and q) → (p or ~p) (p or -p)-((p or q) and (-p)) Oc. O d. P or -p O e. p or -q or p
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