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Untitled Quiz

Total questions: 9

Worksheet time: 7mins

Name
Class
Date
1.

Which of the following is a valid argument form in formal logic?

a)

Affirming the consequent

b)

Modus Ponens

c)

Denying the antecedent

d)

Both A and C

2.

Which of the following is the contrapositive of the statement "If it rains, then I will bring an umbrella"?

a)

If I do not bring an umbrella, then it does not rain.

b)

If I do not bring an umbrella, then it rains.

c)

If it does not rain, then I will not bring an umbrella.

d)

If I bring an umbrella, then it rains.

3.

Which of the following statements is a valid syllogism?

a)

All humans are mortal. Socrates is a human. Therefore, Socrates is mortal.

b)

All humans are mortal. Socrates is mortal. Therefore, Socrates is human.

c)

No humans are mortal. Socrates is a human. Therefore, Socrates is immortal.

d)

All humans are mortal. Socrates is not mortal. Therefore, Socrates is not human.

4.

Which of the following is an example of an invalid argument?

a)

If it rains, the ground will be wet. The ground is wet. Therefore, it rained.

b)

If I study, I will pass the test. I studied. Therefore, I will pass the test.

c)

If I wake up early, I will be on time. I woke up early. Therefore, I will be on time.

d)

If I eat breakfast, I will not be hungry. I ate breakfast. Therefore, I will not be hungry.

5.

What is the logical fallacy in the argument: "Either we pass the test, or we fail. We did not fail. Therefore, we passed"?

a)

False dilemma

b)

Hasty generalization

c)

Affirming the consequent

d)

Circular reasoning

6.

Which of the following is a valid conclusion from the premises: "All students are tired" and "John is a student"?

a)

John is not tired.

b)

John is tired.

c)

John is a teacher.

d)

John is not a student.

7.

Which of the following is an example of an inductive argument?

a)

"The sun has risen every day, so it will rise tomorrow."

b)

"All dogs are friendly, and Max is a dog, so Max is friendly."

c)

"If it rains, the ground will get wet. It rained, so the ground is wet."

d)

"All squares have four sides. This shape has four sides, so it is a square."

8.

Which of the following is an example of a disjunctive syllogism?

a)

Either I will go to the gym or I will stay home. I will not stay home. Therefore, I will go to the gym.

b)

Either I will study or I will go to the party. I studied. Therefore, I will go to the party.

c)

If I go to the party, I will study. I went to the party. Therefore, I studied.

d)

Either I will sleep in or I will wake up early. I woke up early. Therefore, I will sleep in.

9.

All baseballs are round. Represent this in a Venn Diagram showing the validity.