1. Given the following, can you prove the unicorn is mythical? How about Magi-cal? and Horned? (adapted from Barwise and Etchemendy (1993)).if the unicorn is mythical, then it is immortal, but if it is not mythical,then it is a mortal mammal. If the unicorn is either immortal or amammal, then it is horned. The unicorn is magical if it is horned.2. Which of the following are correct?(a) False E True(b) (A A B) E (A + B)(c) A + BEAVB(d) A + BE¬AV B(e) (A V B) ^ (¬A V B) is satisfiable

According to bartleby guidelines, i can solve only first question and his subparts. Please post it…

Answered: 1. Given the following, can you prove…

1. Given the following, can you prove the unicorn is mythical? How about Magi- cal? and Horned? (adapted from Barwise and Etchemendy (1993)).

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

Use of XOR function

XOR function or exclusive OR function was introduced in Excel 2013. This function is available under excel logical functions. For the given statement, the XOR function will return true only when either of the statements is true. It returns false when both the statements are true or when both the statements are false.

Question

1. Given the following, can you prove the unicorn is mythical? How about Magi-
cal? and Horned? (adapted from Barwise and Etchemendy (1993)).
if the unicorn is mythical, then it is immortal, but if it is not mythical,
then it is a mortal mammal. If the unicorn is either immortal or a
mammal, then it is horned. The unicorn is magical if it is horned.
2. Which of the following are correct?
(a) False E True
(b) (A A B) E (A + B)
(c) A + BEAVB
(d) A + BE¬AV B
(e) (A V B) ^ (¬A V B) is satisfiable

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