Reasoning

Logic and Fallacies

1,716 Questions

Understand the fundamentals of propositional logic, logical inference rules, and paradoxes. This set includes identifying logical fallacies, including those found in classical Nyaya logic. Strong grasp of these concepts is crucial for scoring well in the reasoning sections of competitive tests.

Propositional logic modelsLogical inference rulesTypes of logical fallaciesParadoxes and contingent truthsNyaya logic concepts

Logic and Fallacies Questions

Multiple choice

What is the name of the logical fallacy that occurs when a conclusion is drawn from a premise that is based on a false dilemma?

  1. Ad hominem

  2. Begging the question

  3. False dichotomy

  4. Straw man
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

False dichotomy is a logical fallacy that occurs when a conclusion is drawn from a premise that is based on a false dilemma. It is also known as the fallacy of the excluded middle.

Multiple choice

Which of the following is not a mathematical method?

  1. Induction

  2. Deduction

  3. Analogy

  4. Experimentation
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Experimentation is a scientific method, not a mathematical method.

Multiple choice

What is the process of reasoning from a general statement to a specific conclusion called?

  1. Induction

  2. Deduction

  3. Analogy

  4. Syllogism
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Deduction is the process of reasoning from a general statement to a specific conclusion.

Multiple choice

What is the process of reasoning from a specific example to a general conclusion called?

  1. Induction

  2. Deduction

  3. Analogy

  4. Syllogism
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Induction is the process of reasoning from a specific example to a general conclusion.

Multiple choice

What is the process of reasoning from one specific example to another specific example called?

  1. Induction

  2. Deduction

  3. Analogy

  4. Syllogism
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Analogy is the process of reasoning from one specific example to another specific example.

Multiple choice

What is a logical argument that consists of two premises and a conclusion called?

  1. Induction

  2. Deduction

  3. Analogy

  4. Syllogism
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A syllogism is a logical argument that consists of two premises and a conclusion.

Multiple choice

Which of the following is an example of a necessary truth?

  1. The sun rises in the east.

  2. All bachelors are unmarried.

  3. The sky is blue.

  4. The grass is green.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A necessary truth is a statement that is true in all possible worlds. The statement 'All bachelors are unmarried' is true in all possible worlds because it is a tautology, meaning that it is true by definition.

Multiple choice

Which of the following is an example of a contingent truth?

  1. The sun rises in the east.

  2. All bachelors are unmarried.

  3. The sky is blue.

  4. The grass is green.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A contingent truth is a statement that is true in some possible worlds but not in others. The statement 'The sky is blue' is true in some possible worlds (e.g., our world) but not in others (e.g., a world where the sky is red).

Multiple choice

Which of the following is a contingent truth?

  1. 2 + 2 = 4

  2. The Earth is round.

  3. The sun is a star.

  4. Humans are mortal.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The statement 'The Earth is round' is a contingent truth because it is not true in all possible worlds. For example, it is possible to imagine a world in which the Earth is flat.

Multiple choice

Which of the following is a contingent truth?

  1. I think, therefore I am.

  2. The world is real.

  3. Other minds exist.

  4. The external world exists.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The statement 'The world is real' is a contingent truth because it is not true in all possible worlds. For example, it is possible to imagine a world in which the world is not real, such as a dream world.

Multiple choice

What is the purpose of the Example (Udaharana) in the Five-Membered Syllogism?

  1. To provide a specific instance of the Reason.

  2. To introduce a new argument unrelated to the Proposition.

  3. To restate the Proposition in a different form.

  4. To provide a counterargument to the Reason.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Example (Udaharana) is the third member of the Five-Membered Syllogism. It provides a specific instance or example that illustrates the Reason and supports the Proposition. The Example helps to clarify and strengthen the argument.

Multiple choice

What is the function of the Application (Upanaya) in the Five-Membered Syllogism?

  1. To apply the Reason to the Proposition.

  2. To provide a new premise unrelated to the argument.

  3. To restate the Example in a different way.

  4. To introduce a counterargument to the Example.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Application (Upanaya) is the fourth member of the Five-Membered Syllogism. It applies the Reason to the Proposition, demonstrating how the Reason supports the Proposition. The Application shows the logical connection between the Reason and the Proposition.

Multiple choice

What is the significance of the Proposition (Pratijna) in the Five-Membered Syllogism?

  1. It establishes the main claim or conclusion to be proven.

  2. It provides evidence supporting the Reason.

  3. It illustrates the Reason with an example.

  4. It applies the Reason to the Proposition.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Proposition (Pratijna) holds significant importance in the Five-Membered Syllogism. It establishes the main claim or conclusion that the syllogism aims to prove or disprove. The Proposition serves as the foundation for the entire argument.

Multiple choice

How does the Example (Udaharana) contribute to the Five-Membered Syllogism?

  1. It provides a specific instance that supports the Reason.

  2. It introduces a new argument unrelated to the Proposition.

  3. It restates the Proposition in a different form.

  4. It provides a counterargument to the Reason.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Example (Udaharana) plays a crucial role in the Five-Membered Syllogism. It provides a specific instance or example that supports and illustrates the Reason. The Example helps to clarify and strengthen the argument by demonstrating how the Reason applies in a particular case.

Multiple choice

What is the purpose of the Application (Upanaya) in the Five-Membered Syllogism?

  1. To demonstrate the logical connection between the Reason and the Proposition.

  2. To provide a new premise unrelated to the argument.

  3. To restate the Example in a different way.

  4. To introduce a counterargument to the Example.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Application (Upanaya) serves a specific purpose in the Five-Membered Syllogism. It demonstrates the logical connection between the Reason and the Proposition. The Application shows how the Reason supports and establishes the Proposition, ensuring the validity of the argument.