Complete this formal proof of Ex(P(x)v-P(x) from the empty set. NOTE: similar to the rule above when instantiating quantifiers, if you need a random name, always start at the beginning of the alphabet. That is, use a first; only use bif necessary; etc. Hint: notice line 8 is not in any subproof. So if you try a reductio, it needs to be a reductio of whatever goes on line 8! 1.1 2. || 3.|| 4.1 5.1 6.

Complete this formal proof of Ex(P(x)v-P(x) from the empty set. NOTE: similar to the rule above when instantiating quantifiers, if you need a random name, always start at the beginning of the alphabet. That is, use a first; only use bif necessary; etc. Hint: notice line 8 is not in any subproof. So if you try a reductio, it needs to be a reductio of whatever goes on line 8! 1.1 2. || 3.|| 4.1 5.1 6.

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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Concept explainers

Predicates

A predicate is a function defined with set of variables, which returns the result True or False. The output of a predicate is a Boolean value as a response when given a set of parameters:

Question

would appreciate any help!

Complete this formal proof of Ex(P(x)v-P(x)) from the empty set. NOTE: similar to the rule above
when instantiating quantifiers, if you need a random name, always start at the beginning of the
alphabet. That is, use a first; only use bif necessary; etc.
Hint: notice line 8 is not in any subproof. So if you try a reductio, it needs to be a reductio of
whatever goes on line 8!
1. |
2. |1
3. ||
4.||
5.
6.
7.1
8.
9.

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