Exercise 7-4 Symbolize the following sentences, letting Px = “x was U.S. president”; Ix = “x is (was) well informed”; d = “Donald Trump”; and b = “George W. Bush.” 1. All U.S. presidents have been well informed. 3. Not all U.S. presidents have been well informed. 5. But not all U.S. presidents have been ill-informed (not well informed) if George W. Bush was well informed. Now let Sx = “x is a logic student”; Lx = “x is logical”; Px = “x is popular”; and a = “Art.” 7. Logic students are logical. 9. Well, not all logic students are logical. 11.So if all logic students are logical, none of them is popular. 13. Nor is it true that those who are unpopular all are illogical. 15.
Exercise 7-4 Symbolize the following sentences, letting Px = “x was U.S. president”; Ix = “x is (was) well informed”; d = “Donald Trump”; and b = “George W. Bush.” 1. All U.S. presidents have been well informed. 3. Not all U.S. presidents have been well informed. 5. But not all U.S. presidents have been ill-informed (not well informed) if George W. Bush was well informed. Now let Sx = “x is a logic student”; Lx = “x is logical”; Px = “x is popular”; and a = “Art.” 7. Logic students are logical. 9. Well, not all logic students are logical. 11.So if all logic students are logical, none of them is popular. 13. Nor is it true that those who are unpopular all are illogical. 15.
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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Exercise 7-4 Symbolize the following sentences, letting Px = “x was U.S. president”; Ix = “x is (was) well informed”;
d = “Donald Trump”; and b = “George W. Bush.”
1. All U.S. presidents have been well informed.
3. Not all U.S. presidents have been well informed.
5. But not all U.S. presidents have been ill-informed (not well informed) if George W. Bush was well informed.
Now let Sx = “x is a logic student”; Lx = “x is logical”; Px = “x is popular”; and a = “Art.”
7. Logic students are logical.
9. Well, not all logic students are logical.
11.So if all logic students are logical, none of them is popular.
13. Nor is it true that those who are unpopular all are illogical.
15.
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