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 are the four types of fallacies in Nyaya?

  1. Formal fallacies, informal fallacies, material fallacies, and verbal fallacies

  2. Deductive fallacies, inductive fallacies, abductive fallacies, and syllogistic fallacies

  3. Categorical fallacies, hypothetical fallacies, disjunctive fallacies, and syllogistic fallacies

  4. Affirmative fallacies, negative fallacies, universal fallacies, and particular fallacies
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The four types of fallacies in Nyaya are formal fallacies, informal fallacies, material fallacies, and verbal fallacies.

Multiple choice

What is the logical relationship between obligation and permission?

  1. Contraries

  2. Contradictories

  3. Subcontraries

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

Obligation and permission are contraries, meaning that they cannot both be true of the same action at the same time, but both can be false.

Multiple choice

What is the logical relationship between obligation and prohibition?

  1. Contraries

  2. Contradictories

  3. Subcontraries

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

Obligation and prohibition are contradictories, meaning that they cannot both be true of the same action at the same time, and they cannot both be false.

Multiple choice

What is the logical relationship between permission and prohibition?

  1. Contraries

  2. Contradictories

  3. Subcontraries

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

Permission and prohibition are subcontraries, meaning that they cannot both be true of the same action at the same time, but they can both be false.

Multiple choice

What is the most common type of normative reasoning?

  1. Deductive reasoning

  2. Inductive reasoning

  3. Abductive reasoning

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

Deductive reasoning is the most common type of normative reasoning, in which a conclusion is derived from a set of premises that are assumed to be true.

Multiple choice

What is the fallacy of affirming the consequent?

  1. Assuming that the conclusion of an argument is true because the premises are true.

  2. Assuming that the premises of an argument are true because the conclusion is true.

  3. Assuming that a necessary condition is also a sufficient condition.

  4. Assuming that a sufficient condition is also a necessary condition.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The fallacy of affirming the consequent is assuming that the premises of an argument are true because the conclusion is true, which is a logical fallacy.

Multiple choice

What is the fallacy of denying the antecedent?

  1. Assuming that the conclusion of an argument is true because the premises are true.

  2. Assuming that the premises of an argument are true because the conclusion is true.

  3. Assuming that a necessary condition is also a sufficient condition.

  4. Assuming that a sufficient condition is also a necessary condition.
Reveal answer Fill a bubble to check yourself
Correct answer
Explanation

The fallacy of denying the antecedent is assuming that the conclusion of an argument is false because the premises are false, which is a logical fallacy.

Multiple choice

Which of the following is an example of a statement that is true according to the correspondence theory of truth?

  1. The sun is a star.

  2. The sky is blue.

  3. Two plus two equals four.

  4. All dogs are mammals.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The statement "The sun is a star" is true according to the correspondence theory of truth because it accurately describes the way things are in the world. The sun is a large, hot ball of gas that emits light and heat.

Multiple choice

Which of the following is an example of a statement that is false according to the correspondence theory of truth?

  1. The earth is flat.

  2. The moon is made of cheese.

  3. Unicorns exist.

  4. All cats are carnivores.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The statement "The earth is flat" is false according to the correspondence theory of truth because it does not accurately describe the way things are in the world. The earth is actually a sphere.

Multiple choice

What is the term used for analogical reasoning in Islamic jurisprudence?

  1. Ijma

  2. Qiyas

  3. Ijtihad

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

Qiyas is the process of analogical reasoning in Islamic jurisprudence, where a new legal ruling is derived from an existing ruling based on their similarities.

Multiple choice

Which of the following is a deductive reasoning task?

  1. Solving a crossword puzzle

  2. Making a generalization from a set of observations

  3. Drawing a conclusion from a set of premises

  4. Estimating the probability of an event
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Deductive reasoning is a type of logical reasoning in which a conclusion is drawn from a set of premises. In a deductive reasoning task, the conclusion is guaranteed to be true if the premises are true.

Multiple choice

Which of the following is an inductive reasoning task?

  1. Solving a mathematical equation

  2. Making a generalization from a set of observations

  3. Drawing a conclusion from a set of premises

  4. Estimating the probability of an event
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Inductive reasoning is a type of logical reasoning in which a conclusion is drawn from a set of observations. In an inductive reasoning task, the conclusion is not guaranteed to be true, but it is supported by the evidence.

Multiple choice

Which of the following is a propositional logic connective?

  1. And

  2. Or

  3. Not

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Propositional logic connectives are symbols that are used to connect propositions. The most common propositional logic connectives are and, or, and not.

Multiple choice

Which of the following is a first-order logic quantifier?

  1. For all

  2. There exists

  3. Both of the above

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

First-order logic quantifiers are symbols that are used to quantify variables. The most common first-order logic quantifiers are for all and there exists.

Multiple choice

Which of the following is a mathematical model of deductive reasoning?

  1. Syllogistic logic

  2. Propositional logic

  3. First-order logic

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Syllogistic logic, propositional logic, and first-order logic are all mathematical models of deductive reasoning.