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

A scientific hypothesis can become a theory if ___

  1. the hypothesis can be tested at least once

  2. the entire scientific community accepts it

  3. hypothesis is tested and competing hypothesis r elimainated

  4. there are no other competing hypotheses
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A hypothesis becomes a theory after it has been repeatedly tested, supported by evidence, and competing explanations have been ruled out. Acceptance by the community follows the evidence, not the other way around.

Multiple choice

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

  1. The presence of oxygen in the atmosphere

  2. The presence of water on Earth

  3. The presence of life on Earth

  4. The presence of humans on Earth
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The presence of oxygen in the atmosphere is a necessary cause for the existence of life on Earth, because life cannot exist without oxygen.

Multiple choice

What is the name of the logical fallacy that occurs when someone claims that a theory is true because it has not yet been proven false?

  1. The fallacy of affirming the consequent

  2. The fallacy of denying the antecedent

  3. The fallacy of appeal to ignorance

  4. The fallacy of circular reasoning
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The fallacy of appeal to ignorance occurs when someone claims that a theory is true because it has not yet been proven false. This is a fallacy because the absence of evidence against a theory does not necessarily mean that the theory is true.

Multiple choice

What is the demarcation criterion proposed by the logical positivists?

  1. Verifiability

  2. Falsifiability

  3. Testability

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

The logical positivists proposed the verifiability criterion as a way to distinguish between science and non-science. According to this criterion, a statement is scientific only if it can be verified through empirical observation.

Multiple choice

What is the name of the problem that arises when a theory makes successful predictions but is not falsifiable?

  1. The problem of induction

  2. The problem of demarcation

  3. The problem of underdetermination

  4. The problem of confirmation
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The problem of underdetermination arises when a theory makes successful predictions but is not falsifiable. This means that there are multiple theories that could potentially explain the same data, and there is no way to determine which theory is true.

Multiple choice

What is the main idea behind paraconsistent logic?

  1. It allows for contradictions to be true.

  2. It rejects the law of non-contradiction.

  3. It is a type of logic that is used in mathematics.

  4. It is a type of logic that is used in computer science.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Paraconsistent logic is a type of logic that allows for contradictions to be true. This means that it is possible for a statement and its negation to both be true at the same time.

Multiple choice

What are some of the implications of dialetheism?

  1. It means that there is no such thing as truth.

  2. It means that everything is true.

  3. It means that logic is useless.

  4. It means that reality is fundamentally contradictory.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

One of the implications of dialetheism is that reality is fundamentally contradictory. This is because dialetheism allows for contradictions to be true, which means that it is possible for things to be both true and false at the same time.

Multiple choice

What are some of the potential applications of paraconsistent logic?

  1. In computer science, to handle inconsistent data.

  2. In philosophy, to analyze paradoxes.

  3. In law, to resolve contradictions in legal documents.

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

Paraconsistent logic has a number of potential applications, including in computer science, philosophy, and law. In computer science, paraconsistent logic can be used to handle inconsistent data. In philosophy, paraconsistent logic can be used to analyze paradoxes. In law, paraconsistent logic can be used to resolve contradictions in legal documents.

Multiple choice

Which of the following is a true statement about order logic?

  1. Order logic is a branch of mathematical logic that deals with the concept of order.

  2. Order logic is used to study the properties of ordered sets.

  3. Order logic is used to develop algorithms for sorting and searching data.

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

Order logic is a branch of mathematical logic that deals with the concept of order. It is used to study the properties of ordered sets and to develop algorithms for sorting and searching data.

Multiple choice

What is the most basic type of order logic?

  1. Total order logic

  2. Partial order logic

  3. Linear order logic

  4. Strict order logic
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Total order logic is the most basic type of order logic. It is a binary relation that is transitive, reflexive, and antisymmetric.

Multiple choice

What is a strict order logic?

  1. A linear order logic that is also dense.

  2. A linear order logic that is also connected.

  3. A linear order logic that is also well-founded.

  4. A linear order logic that is also complete.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A strict order logic is a linear order logic that is also dense. It is a binary relation that is transitive, reflexive, antisymmetric, and dense.