What is of the following formulae are tautologies (always true)? (Select all that are tautologies). Select one or more: a. p-true b. true-p c false-p Od p-false What is of the following formulae are contradictions (always false)? (Select all that are contradictions). Select one or more: 9440 b. true false OC PAP O d. pv-p

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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propositional logic

What is of the following formulae are tautologies (always true)?
(Select all that are tautologies).
Select one or more:
ap-true
Ob true-p
OC false-p
Od. p-false
What is of the following formulae are contradictions (always false)?
(Select all that are contradictions).
Select one or more:
app
b. true false
OC PA-P
O d. pv-p.
|
Transcribed Image Text:What is of the following formulae are tautologies (always true)? (Select all that are tautologies). Select one or more: ap-true Ob true-p OC false-p Od. p-false What is of the following formulae are contradictions (always false)? (Select all that are contradictions). Select one or more: app b. true false OC PA-P O d. pv-p. |
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