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Find the argument form for the following argument and determine whether it is valid. Can we conclude that the conclusion is true if the premises are true?
If Socrates is human, then Socrates is mortal. Socrates is human. Socrates is mortal.

Short Answer

Expert verified

The argument form can be found and valid can be determined.

Step by step solution

01

Constructing the truth table for the premises

Take p be the proposition for “Socrates in human” and q be “Socrates is mortal”. There is an abstract form in the argument. The argument is in Modus ponens form. The construction of truth table for the premises as,

p

q

\(p \to q\)

p

Q (conclusion)

T

T

T

T

T

T

F

F

T

F

F

T

T

F

T

F

F

T

F

F

02

Conclusion for the premises

The first row is the only row when there are two true premises and conclusion also true. So that the Modus Ponens is valid. It will use a conditional statement when p and q are true. The second assumption is true p statement. It concluded that when there are true premises then conclusion also true.

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Most popular questions from this chapter

Use truth tables to verify these equivalences

You can graduate only if you have completed the requirements of your major and you do not owe money to the university and you do not have an overdue library book. Express your answer in terms of g: “You can graduate,” m: “You owe money to the university,” r: “You have completed the requirements of your major,” and b: “You have an overdue library book.”

Write each of these statements in the form “if p, then q” in English. [Hint: Refer to the list of common ways to express conditional statements.]

a) It snows whenever the wind blows from the northeast.
b) The apple trees will bloom if it stays warm for a week.
c) That the Pistons win the championship implies that they beat the Lakers.
d) It is necessary to walk miles to get to the top of Long’s Peak.
e) To get tenure as a professor, it is sufficient to be world famous.
f ) If you drive more than miles, you will need to buy gasoline.
g) Your guarantee is good only if you bought your CD player less than days ago.
h) Jan will go swimming unless the water is too cold.

Let p, q, and r be the propositions

p : You have the flu.

q: You miss the final examination.

r : You pass the course.

Express each of these propositions as an English sentence.

a) pq

b) ¬qr

c) q¬r

d)pqr

e)(p¬r)(q¬r)

f ) (pq)(¬qr)

Let Q(x,y)be the statement “xhas sent an e-mail message to y,” where the domain for both xand yconsists of all students in your class. Express each of these quantifications in English.

(a) xyQ(x,y) (b) xyQ(x,y)

(c)xyQ(x,y) (d)yxQ(x,y)

(e)yxQ(x,y) (f)xyQ(x,y)

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