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 six-sigma green-belt
  1. TRUE

  2. FALSE

  3. Can't Say

  4. Not possible

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Correlation and causation are fundamentally different concepts. Correlation indicates that two variables change together, but does not prove that one variable causes the other to change. A correlation could be coincidental, or both variables might be caused by a third hidden variable (confounding factor). This is why 'Correlation doesn't mean causation' is a TRUE statement.

Multiple choice general knowledge
  1. Prove

  2. Deduct

  3. Disagree

  4. Debate

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

To abate means to diminish, reduce, or deduct something - such as abating a nuisance, abating rent, or abating a tax. 'Deduct' is the closest synonym among the options. Prove, disagree, and debate are unrelated to the meaning of abate. The word comes from Old French 'abatre' meaning 'to beat down'.

Multiple choice general knowledge
  1. Complimenting

  2. Casual Statement

  3. Multiple verbs

  4. Repetition of meaning

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Tautology refers to the repetition of the same meaning using different words - a redundancy in expression. Saying 'free gift' or 'ATM machine' are common examples. It's a rhetorical device or logical error where the conclusion is already contained in the premise.

Multiple choice general knowledge
  1. reasonable

  2. unbelievable

  3. problematic

  4. costly

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

'Plausible' means reasonable, believable, or credible - something that could be true or likely. Options B (unbelievable) and C (problematic) are opposites or unrelated, while D (costly) refers to expense not believability. A plausible excuse is one that seems reasonable.

Multiple choice general knowledge
  1. uttering somthing

  2. The process of branching

  3. The reason behind something

  4. none

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Ramification refers to the process of branching or developing consequences. It describes how one action or decision can lead to multiple outcomes or effects, like branches spreading from a central point.

Multiple choice general knowledge
  1. truth

  2. direct

  3. fictitious

  4. example

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

APOCRYPHAL means fictitious, of doubtful authenticity, or not genuine. It originally referred to texts not included in the official Bible canon. The correct answer is 'fictitious'. 'Truth' and 'direct' are opposites. 'Example' is unrelated to the meaning of doubtful authenticity.

Multiple choice general knowledge science & technology
  1. It's a superset of fuzzy logic

  2. It's a subset of fuzzy logic

  3. It's totally unrelated

  4. They are identical

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

According to the extension principle in fuzzy logic, boolean logic is a special case or subset of fuzzy logic. When fuzzy membership values are restricted to only 0 and 1, fuzzy logic behaves exactly like boolean logic, making boolean logic a subset of the more general fuzzy logic framework.

Multiple choice general knowledge science & technology
  1. Boolean conditions

  2. Propositional logic

  3. Human decision making process

  4. The Turing Machine

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Fuzzy logic extends classical logic by allowing partial truth values between 0 and 1, making it ideal for modeling human reasoning which often deals with degrees of certainty rather than binary true/false. It was specifically developed to handle the vagueness and ambiguity inherent in human decision-making processes. Boolean conditions (A) and propositional logic (B) deal only with binary true/false values, while the Turing Machine (D) is a computational model unrelated to fuzzy reasoning.

Multiple choice general knowledge math & puzzles
  1. Theorems

  2. Assumptions

  3. Definitions

  4. Postulates

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In formal mathematical proofs, you must use established truths like theorems, definitions, and postulates. Assumptions (unless part of a temporary hypothesis for contradiction) cannot serve as the final justification for a step in a deductive proof.

Multiple choice general knowledge math & puzzles
  1. Reductio Ad Absurdum

  2. Quod Erat Demonstrandum

  3. Credo quia absurdum

  4. Argumentum Ad Absurdum

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Reductio Ad Absurdum is a form of argument that establishes a claim by showing that its opposite leads to an absurdity or contradiction. Q.E.D. is a notation used at the end of a proof, not a technique itself.

Multiple choice general knowledge culture
  1. Partial

  2. Propensity

  3. Prediction

  4. Proclaim

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Pravratti is a Sanskrit term referring to natural tendency or inclination. Propensity means a natural tendency to behave in a particular way. Prediction and Proclaim are unrelated; Partial is only loosely connected.

Multiple choice general knowledge
  1. Irrational

  2. Irregular

  3. Insistent

  4. Irrelevant

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Pertinent means relevant and applicable to the matter at hand. Irrelevant means not relevant or applicable - the direct opposite. Irrational relates to logic, irregular means not following a pattern, and insistent means demanding.