Lesson 43 : Valid Arguments and Fallacies

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Valid Arguments and Fallacies

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Valid Arguments and Fallacies

1 / 9

Which of the following is true with the argument, “If you are a licensed teacher, then you are a professional. You are not a licensed teacher. Therefore, you are not a professional.”?

a. It is a fallacy by Fallacy of the Inverse.

b. It is a fallacy by Fallacy of the Converse.

c. It is valid by Modus Tollens.

d. It is valid by Modus Ponens

2 / 9

Which of the following is true with the argument, “If you exercise regularly, then your blood pressure becomes manageable. Your blood pressure becomes manageable. Therefore, you exercise regularly.”?

a. It is a fallacy by Fallacy of the Converse.

b. It is a fallacy by Fallacy of the Inverse.

c. It is valid by Rule of Addition.

d. It is valid by Rule of Simplification.

3 / 9

Which of the following is true with the argument, “If you make it a habit to do good, then you eventually possess a happy heart. If you possess a happy heart, then your body and soul become healthier. Hence, if you make it a habit to do good, then your body and soul become healthier.”?

a. It is a fallacy by Affirming a Disjunct.

b. It is a fallacy by Denying a Conjunct.

c. It is valid by Rule of Contradiction.

d. It is valid by Law of Syllogism.

4 / 9

Which of the following is true with the argument, “If the weather is fair, then there are visible stars at night. There are visible stars at night. Therefore, the weather is fair.”?

a. It is valid by Modus Tollens.

b. It is valid by Modus Ponens.

c. It is a fallacy by Fallacy of the Converse.

d. It is a fallacy by Improper Transposition.

5 / 9

Which of the following is true with the argument, “If the weather is fair, then there are visible stars at night. There are no visible stars at night. Therefore, the weather is not fair.”?

a. It is a fallacy by Fallacy of the Consequent.

b. It is a fallacy by Affirming the Disjunct.

c. It is valid by Modus Tollens.

d. It is valid by Modus Ponens

6 / 9

“If you exercise daily, then you have higher chance to become healthy. You exercise daily. Therefore, you have higher chance to become healthy. How would you represent the conclusion?

a. 𝑝∧𝑞

b. 𝑝∨𝑞

c. 𝑞

d. 𝑝

7 / 9

“If you exercise daily, then you have higher chance to become healthy. You exercise daily. Therefore, you have higher chance to become healthy. How would you represent the second premise?

a. 𝑞

b. 𝑝

c. 𝑝∧𝑞

d. 𝑝∨𝑞

8 / 9

“If you exercise daily, then you have higher chance to become healthy. You exercise daily. Therefore, you have higher chance to become healthy. How would you represent the first premise?

a. 𝑞→𝑝

b. 𝑝→𝑞

c. 𝑝

d. 𝑞

9 / 9

What is true about an argument?

a. It is always valid.

b. It can never be a fallacy.

c. It is formed by a conclusion supporting the premises.

d. It is formed by premises supporting the conclusion.

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