Civil Service Verbal Reasoning Test Logical Inference and Conclusion Drawing Syllabus

Logical Inference and Conclusion Drawing syllabus — full chapter and topic list

Expand any chapter to see its topics and sub-topics. This is the whole examinable outline for Logical Inference and Conclusion Drawing in Civil Service Verbal Reasoning Test, not a summary of it.

1. 1

   The True / False / Cannot Say Decision Model

   4 topics

   • Defining True
     • Directly stated or logically entailed by the passage
     • Paraphrase that preserves meaning
   • Defining False
     • Directly contradicted by the passage
     • Statement reverses or distorts a claim
   • Defining Cannot Say
     • Insufficient information in the passage
     • Plausible but unsupported claims
   • The passage-only rule
     • Ignoring outside knowledge and personal opinion
     • Treating the passage as the sole source of truth
2. 2

   Deductive Reasoning from Text

   3 topics

   • Valid entailment
     • What necessarily follows from premises
     • Conjunction and conditional reasoning in prose
   • Common deductive fallacies
     • Affirming the consequent
     • Denying the antecedent
   • Quantifiers in plain language
     • All, some, most, none and few
     • Illicit conversion of quantified claims
3. 3

   Inductive and Evaluative Reasoning

   3 topics

   • Distinguishing fact from opinion
     • Verifiable statements versus value judgements
     • Attributed opinions within the passage
   • Strength of claims and qualifiers
     • Absolute versus hedged language
     • How qualifiers change a True/False decision
   • Drawing the best supported conclusion
     • Choosing among competing inferences
     • Avoiding overreach beyond the evidence
4. 4

   Avoiding Inference Traps

   3 topics

   • Assumption injection
     • Adding unstated steps to reach True
     • Confusing likely with certain
   • Real-world knowledge bias
     • Marking True because it sounds correct
     • Disagreeing with the passage on personal grounds
   • Scope and degree distortions
     • Generalising a specific claim
     • Narrowing a general claim

Logical Inference and Conclusion Drawing flashcards for Civil Service Verbal Reasoning Test

21 of 50 cards from the Logical Inference and Conclusion Drawing deck — real questions with worked answers.

1. In a verbal reasoning test, what does the verdict 'True' mean about a statement?

   The statement logically follows from, or is directly supported by, the information given in the passage alone. The passage proves it must be the case.

2. What does the verdict 'False' mean about a statement in verbal reasoning?

   The statement contradicts the passage, or the passage gives information that proves the statement cannot be true. The passage disproves it.

3. What does the verdict 'Cannot Say' mean in verbal reasoning?

   The passage neither proves nor disproves the statement; there is insufficient information to judge it definitively as True or False from the text alone.

4. State the single most important rule governing every answer in a Civil Service verbal reasoning test.

   The passage-only rule: judge each statement using ONLY the information in the passage, never outside knowledge, assumptions, or personal opinion.

5. Why must you ignore your own real-world knowledge when answering verbal reasoning questions?

   Because the test measures whether a conclusion follows from the given text, not from facts you already know. Outside knowledge can make a 'Cannot Say' wrongly look 'True'.

6. Define 'valid entailment' in logical inference.

   A conclusion is validly entailed when it must be true whenever the premises are true; the truth of the premises guarantees the truth of the conclusion.

7. What is the difference between a valid argument and a sound argument?

   A valid argument has a conclusion that follows logically from its premises; a sound argument is valid AND has premises that are actually true.

8. Identify the deductive fallacy: 'If it rains, the ground is wet. The ground is wet, therefore it rained.'

   Affirming the consequent. The ground could be wet for another reason, so the conclusion does not validly follow.

9. Identify the deductive fallacy: 'If it rains, the ground is wet. It did not rain, therefore the ground is not wet.'

   Denying the antecedent. The ground might still be wet from another cause, so the conclusion is invalid.

10. Name the valid argument form: 'If P then Q; P is true; therefore Q.'

    Modus ponens (affirming the antecedent) — a valid deductive form.

11. Name the valid argument form: 'If P then Q; Q is false; therefore P is false.'

    Modus tollens (denying the consequent) — a valid deductive form.

12. In quantifier terms, what does the word 'all' assert, and what is its logical negation?

    'All A are B' asserts every A is B. Its negation is 'at least one A is not B' (some A are not B), NOT 'no A are B'.

13. In plain-language quantifiers, what does 'some' mean in formal logic?

    'Some' means 'at least one' (one or more). It does not imply 'not all' and does not specify a majority.

14. If a passage says 'Most employees received training,' can you conclude a specific named employee was trained?

    No — Cannot Say. 'Most' means more than half, but it does not tell you about any particular individual.

15. What is the logical relationship between 'No A are B' and 'Some A are B'?

    They are contradictories — exactly one must be true. If 'No A are B' is true, 'Some A are B' is false, and vice versa.

16. How do you distinguish a fact from an opinion in a passage?

    A fact is a statement that can in principle be verified as true or false; an opinion expresses a belief, judgement, or evaluation (e.g. 'best', 'should', 'unfair') that cannot be objectively verified.

17. Why does identifying opinion words matter when judging True/False/Cannot Say?

    Opinions in a statement usually cannot be proven by a factual passage, so statements relying on subjective judgement often default to 'Cannot Say' unless the passage explicitly states that opinion.

18. Rank these claim-strength qualifiers from weakest to strongest: 'always', 'sometimes', 'often'.

    Sometimes (weakest) < often < always (strongest, universal).

19. How does a strong qualifier like 'always' or 'never' make a statement harder to verify as True?

    Universal qualifiers require the passage to support EVERY case with no exceptions; a single counter-instance or any gap makes it False or Cannot Say.

20. How does a weak qualifier like 'may', 'some', or 'can' affect how easily a statement is judged True?

    Weak/hedged qualifiers are easier to support because they only require one instance or a possibility, so they are more often verifiable as True.

21. What does it mean to 'draw the best supported conclusion' rather than a possible conclusion?

    Choosing the conclusion most directly and fully backed by the passage's stated evidence, with the least added assumption — not merely one that could conceivably be true.

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