Reasoning

Logic and Fallacies

1,803 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

Which of the following is an example of a valid syllogism using a Karya Hetu?

  1. All fire is hot because it burns things

  2. All smoke is a sign of fire because it is always produced by fire

  3. The absence of smoke is a sign of the absence of fire
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

All smoke is a sign of fire because it is always produced by fire is an example of a valid syllogism using a Karya Hetu because the hetu (being produced by fire) is an effect or result of fire.

Multiple choice

Which of the following is an example of a valid syllogism using an Asatkarya Hetu?

  1. All fire is hot because it burns things

  2. All smoke is a sign of fire because it is always produced by fire

  3. The absence of smoke is a sign of the absence of fire
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The absence of smoke is a sign of the absence of fire is an example of a valid syllogism using an Asatkarya Hetu because the hetu (absence of smoke) is the absence of an effect or result that would be expected if fire were present.

Multiple choice

Which of the following is a key feature of Indian logic that distinguishes it from Western logic?

  1. Emphasis on syllogistic reasoning

  2. Inclusion of non-classical logics

  3. Focus on the role of language in reasoning

  4. Reliance on deductive arguments
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Indian logic is renowned for its exploration of non-classical logics, such as many-valued logic and paraconsistent logic, which challenge the traditional assumptions of Western logic.

Multiple choice

How has Indian logic contributed to the field of software engineering?

  1. By providing formal methods for software verification

  2. By aiding in the development of fault-tolerant systems

  3. By facilitating the design of secure software

  4. By enabling the creation of self-healing software
Reveal answer Fill a bubble to check yourself
Correct answer
Explanation

Indian logic has made notable contributions to software engineering by offering formal methods for software verification, aiding in the development of fault-tolerant systems, facilitating the design of secure software, and enabling the creation of self-healing software.

Multiple choice

Which of the following is a type of fallacy in Nyaya logic that occurs when the conclusion is not logically connected to the premises?

  1. Anaikantika

  2. Satpratipaksa

  3. Viruddha

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

Anaikantika is a type of fallacy in Nyaya logic that occurs when the conclusion is not logically connected to the premises and there are other possible explanations for the evidence.

Multiple choice

What is the name of the logical fallacy that involves drawing a conclusion based on insufficient or irrelevant evidence?

  1. Ad hominem

  2. Straw man

  3. Post hoc ergo propter hoc

  4. Begging the question
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Post hoc ergo propter hoc is a logical fallacy that occurs when a conclusion is drawn based on the assumption that because one event follows another, the first event caused the second.

Multiple choice

What is the name of the logical fallacy that involves attacking the person making an argument rather than the argument itself?

  1. Ad hominem

  2. Straw man

  3. Post hoc ergo propter hoc

  4. Begging the question
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Ad hominem is a logical fallacy that occurs when an argument is rejected based on the personal characteristics or beliefs of the person making the argument rather than on the merits of the argument itself.

Multiple choice

What is the name of the logical fallacy that involves creating a distorted or exaggerated version of an opponent's argument in order to make it easier to attack?

  1. Ad hominem

  2. Straw man

  3. Post hoc ergo propter hoc

  4. Begging the question
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Straw man is a logical fallacy that occurs when an argument is misrepresented or distorted in order to make it easier to attack, rather than addressing the actual argument being made.

Multiple choice

In Indian logic, what is the term for a logical fallacy that arises from the misuse of language?

  1. Hetvabhasa

  2. Sadhyabhasa

  3. Dharmakanda

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

Hetvabhasa is a term used in Indian logic to refer to a logical fallacy that arises from the misuse of language. It occurs when a reason or argument is invalid due to linguistic errors or ambiguities.

Multiple choice

In Indian thought, what is the term for a logical fallacy that arises from a faulty connection between a reason and its conclusion?

  1. Hetvabhasa

  2. Sadhyabhasa

  3. Dharmakanda

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

Vyaptigraha is a term used in Indian logic to refer to a logical fallacy that arises from a faulty connection between a reason and its conclusion. It occurs when a reason is not universally applicable or does not necessarily lead to the conclusion.

Multiple choice

In Indian logic, what is the term for a logical fallacy that arises from a faulty middle term in a syllogism?

  1. Hetvabhasa

  2. Sadhyabhasa

  3. Dharmakanda

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

Sadhyabhasa is a term used in Indian logic to refer to a logical fallacy that arises from a faulty middle term in a syllogism. It occurs when the middle term is not properly related to both the major and minor terms, leading to an invalid argument.

Multiple choice

In Indian thought, what is the term for a logical fallacy that arises from a faulty generalization?

  1. Hetvabhasa

  2. Sadhyabhasa

  3. Dharmakanda

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

Dharmakanda is a term used in Indian logic to refer to a logical fallacy that arises from a faulty generalization. It occurs when a conclusion is drawn based on insufficient or unrepresentative evidence.

Multiple choice

In Indian logic, what is the term for a logical fallacy that arises from a faulty analogy?

  1. Hetvabhasa

  2. Sadhyabhasa

  3. Dharmakanda

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

Upamanadosha is a term used in Indian logic to refer to a logical fallacy that arises from a faulty analogy. It occurs when an analogy is used to support an argument, but the analogy is not relevant or appropriate.

Multiple choice

In Indian thought, what is the term for a logical fallacy that arises from a faulty causal relationship?

  1. Hetvabhasa

  2. Sadhyabhasa

  3. Dharmakanda

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

Hetvabhasa is a term used in Indian logic to refer to a logical fallacy that arises from a faulty causal relationship. It occurs when a reason or argument is based on an invalid or incorrect causal connection.

Multiple choice

In Indian logic, what is the term for a logical fallacy that arises from a faulty definition?

  1. Hetvabhasa

  2. Sadhyabhasa

  3. Dharmakanda

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

Vyaptigraha is a term used in Indian logic to refer to a logical fallacy that arises from a faulty definition. It occurs when a definition is too broad or too narrow, leading to an invalid argument.