Logical Reasoning 120 PYQS PART 3 FOR NTA UGC NET SET SLET
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CBSE UGC NET DECEMBER 2011
Q.41. Which of the following statements are true? Choose from the codes given below.
- Some arguments, while not completely valid, are almost valid.
- A sound argument may be invalid.
- A cogent argument may have a probably false conclusion.
- A statement may be true or false.
Codes:
(A) 1 and 2
(B) 1, 3 and 4
(C) 4 alone
(D) 3 and 4
Answer – D
CBSE UGC NET JUNE 2012
Q.42. In the expression ‘Nothing is larger than itself’ the relation ‘is larger than’ is
(A) antisymmetric
(B) asymmetrical
(C) intransitive
(D) irreflexive
Answer – D
Q.43. Assertion (A) : There are more laws on the books today than ever before, and more crimes being committed than ever before.
Reason (R) : Because to reduce crime we must eliminate the laws.
Choose the correct answer from below :
(A) (A) is true, (R) is doubtful and (R) is not the correct explanation of (A).
(B) (A) is false, (R) is true and (R) is the correct explanation of (A).
(C) (A) is doubtful, (R) is doubtful and (R) is not the correct explanation of (A).
(D) (A) is doubtful, (R) is true and (R) is not the correct explanation of (A).
Answer – A
Q.44. If the proposition “All men are not mortal” is true then which of the following inferences is correct? Choose from the code given below:
- “All men are mortal” is true.
- “Some men are mortal” is false.
- “No men are mortal” is doubtful.
- “All men are mortal” is false.
Code:
(A) 1, 2 and 3
(B) 2, 3 and 4
(C) 1, 3 and 4
(D) 1 and 3
Answer – B
Q.45. Determine the nature of the following definition: “Abortion” means the ruthless murdering of innocent beings.
(A) Lexical
(B) Persuasive
(C) Stipulative
(D) Theoretical
Answer – B
Q.46. Which one of the following is not an argument?
(A) Devadutt does not eat in the day so he must be eating at night.
(B) If Devadutt is growing fat and if he does not eat during the day, he will be eating at night.
(C) Devadutt eats in the night so he does not eat during the day.
(D) Since Devadutt does not eat in the day, he must be eating in the night.
Answer – B
Q.47. Venn diagram is a kind of diagram to
(A) represent and assess the validity of elementary inferences of syllogistic form.
(B) represent but not assess the validity of elementary inferences of syllogistic form.
(C) represent and assess the truth of elementary inferences of syllogistic form.
(D) assess but not represent the truth of elementary inferences of syllogistic form.
Answer – B
Q.48. Reasoning by analogy leads to
(A) certainty
(B) definite conclusion
(C) predictive conjecture
(D) surety
Answer – C
Q.49. Which of the following statements are false? Choose from the code given below:
- Inductive arguments always proceed from the particular to the general.
- A cogent argument must be inductively strong.
- A valid argument may have a false premise and a false conclusion.
- An argument may legitimately be spoken of as ‘true’ or ‘false’.
Code:
(A) 2, 3 and 4
(B) 1 and 3
(C) 2 and 4
(D) 1 and 2
Answer – C
CBSE UGC NET DECEMBER 2012
Q.50. By which of the following proposition, the proposition ‘some men are not honest’ is contradicted?
(A) All men are honest.
(B) Some men are honest.
(C) No men are honest.
(D) All of the above.
Answer – A
Q.51. A stipulative definition is
(A) always true
(B) always false
(C) sometimes true sometimes false
(D) neither true nor false
Answer – D
Q.52. If the statement ‘most of the students are obedient’ is taken to be true, which one of the following pair of statements can be claimed to be true?
- All obedient persons are students.
- All students are obedient.
III. Some students are obedient.
- Some students are not disobedient.
Codes:
(A) I & II
(B) II & III
(C) III & IV
(D) II & IV
Answer – C
Q.53. Choose the right code:
A deductive argument claims that:
- The conclusion does not claim something more than that which is contained in the premises.
- The conclusion is supported by the premise/premises conclusively.
III. If the conclusion is false, then premise/premises may be either true or false.
- If premise/combination of premises is true, then conclusion must be true.
Codes:
(A) I and II
(B) I and III
(C) II and III
(D) All the above
Answer – A
CBSE UGC NET JUNE 2013
Q.54. If the statement ‘some men are honest’ is false, which among the following statements will be true Choose the correct code given below
(i) All men are honest
(ii) No men are honest
(iii) Some men are not honest
(iv) All men are dishonest
Codes:
(A) (i), (ii) and (iii)
(B) (ii), (iii) and (iv)
(C) (i), (iii) and (iv)
(D) (ii), (i) and (iv)
Answer – B
Q.55. A definition put forward to resolve a dispute by influencing attitudes or stirring emotions is called
(A)Lexical
(B) Persuasive
(C) Stipulative
(D) Precisions
Answer – B
Q.56. Which of the codes given below contains only the correct statements?
Statements:
(i) Venn diagram is a clear method of notation
(ii) Venn diagram is the most direct method of testing the validity of categorical syllogisms
(iii) In Venn diagram method the premises and the conclusion of a categorical syllogism is diagrammed.
(iv) In Venn diagram method the three overlapping circles are drawn for testing a categorical syllogism
Codes:
(A) (i) (ii) & (iii)
(B) (i) (ii) & (iv)
(C) (ii) (iii) & (iv)
(D) (i) (iii) &(iv)
Answer – B
Q.57. Inductive reasoning presupposes
(A) Unity in human nature
(B) Integrity in human nature
(C) Uniformity in human nature
(D) Harmony in human nature
Answer – C
CBSE UGC NET DECEMBER 2013
Q.58. If two propositions having the same subject and predicate terms are such that one is the denial of the other, the relationship between them is called
(A) Contradictory
(B) Contrary
(C) Sub-contrary
(D) Sub-alternation
Answer – A
Q.59. A stipulative definition may be said to be
(A) Always true
(B) Always false
(C) Sometimes true, sometimes false
(D) Neither true nor false
Answer – D
Q.60. When the conclusion of an argument follows from its premise/premises conclusively, the argument is called
(A) Circular argument
(B) Inductive argument
(C) Deductive argument
(D) Analogical argument
Answer – C