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- Question
Statements: All needles are threads. All threads are boxes. All trees are boxes.
Conclusions:
- No needle is tree.
- Some trees are threads.
- Some boxes are needles.
- Some trees are needles.
Options- A. None follows
- B. Only either I or IV follows
- C. Only either I or IV, and II follow
- D. Only III follows
- E. Only either I or IV, and III follow
- Correct Answer
- Only either I or IV, and III follow
ExplanationAll needles are threads. All threads are boxes.Since both the premises are universal and affirmative, the conclusion must be universal affirmative (A-type) and should not contain the middle term. So, it follows that 'All needles are boxes'. III is the converse of this conclusion and so it holds.
All threads are boxes. All trees are boxes.
Since the middle term 'boxes' is not distributed even once in the premises, no definite conclusion follows.
All needles are boxes. All trees are boxes.
Again, since the middle term 'boxes' is not distributed even once in the premises, no definite conclusion can be drawn. However, I and IV involve the extreme terms of these two statements and form a complementary pair. Thus, either I or IV follows.
More questions
- 1. Statement: Should all the legislators be forced to resign from their profession?
Arguments:
- Yes. They will be able to devote more time for the country.
- No, nobody will contest election.
Options- A. Only argument I is strong
- B. Only argument II is strong
- C. Either I or II is strong
- D. Neither I nor II is strong
- E. Both I and II are strong Discuss
Correct Answer: Only argument I is strong
Explanation:
The legislators should surely not be engaged in any other profession because only then will they be able to work with devotion. So, argument I holds. Also, if such a law is enforced, only those people will contest elections who are really prepared to work for the country. So, argument II is vague.- 2. During the past year, Josh saw more movies than Stephen.
Stephen saw fewer movies than Darren.
Darren saw more movies than Josh.
If the first two statements are true, the third statement is
Options- A. true
- B. false
- C. uncertain Discuss
Correct Answer: uncertain
Explanation:
Because the first two sentences are true, both Josh and Darren saw more movies than Stephen. However, it is uncertain as to whether Darren saw more movies than Josh.- 3. Statements: All boys are honest. Sachin is honest.
Conclusions:
- Sachin is a boy.
- All honest persons are boys.
Options- A. Only conclusion I follows
- B. Only conclusion II follows
- C. Either I or II follows
- D. Neither I nor II follows
- E. Both I and II follow Discuss
Correct Answer: Neither I nor II follows
Explanation:
Both the premises are A type propositions. So, the middle term 'honest' forming the predicate in each is not distributed in either. Since the middle term is not distributed even once, no definite conclusion follows.- 4. Statement: The private bus service in the city has virtually collapsed because of the ongoing strike of its employees.
Assumptions:
- Going on strikes has become the right of every employee.
- People no more require the services of private bus operators.
Options- A. Only assumption I is implicit
- B. Only assumption II is implicit
- C. Either I or II is implicit
- D. Neither I nor II is implicit
- E. Both I and II are implicit Discuss
Correct Answer: Neither I nor II is implicit
Explanation:
Since both the assumptions do not follow from the given statement, so neither I nor II is implicit.- 5. Statement: Amongst newspapers, I always read the National Times.
Assumptions:
- The National Times gives very comprehensive news.
- Some people prefer other newspapers.
Options- A. Only assumption I is implicit
- B. Only assumption II is implicit
- C. Either I or II is implicit
- D. Neither I nor II is implicit
- E. Both I and II are implicit Discuss
Correct Answer: Only assumption II is implicit
Explanation:
The statement does not mention any quality of the National Times. So, I is not implicit. According to the statement, amongst all newspapers, the narrator reads the National Times. This means that some people read other newspapers. So, II is implicit.- 6. Statement: Neither fascism nor communism has any chance of succeeding in America.
Assumptions:
- American people are strongly in favour of preserving the rights of the individual.
- Americans have so far not suffered any pangs of poverty or deprivation.
Options- A. Only assumption I is implicit
- B. Only assumption II is implicit
- C. Either I or II is implicit
- D. Neither I nor II is implicit
- E. Both I and II are implicit Discuss
Correct Answer: Only assumption I is implicit
Explanation:
Clearly, fascism and communism are against the preservation of individual rights. So, I is implicit. Nothing is mentioned about the economic condition of America. So, II is not implicit.- 7. Statements:
- India has surpassed the value of tea exports this year over all the earlier years due to an increase in demand for quality tea in the European market.
- There is an increase in demand of coffee in the domestic market during the last two years.
Options- A. Statement I is the cause and statement II is its effect
- B. Statement II is the cause and statement I is its effect
- C. Both the statements I and II are independent causes
- D. Both the statements I and II are effects of independent causes
- E. Both the statements I and II are effects of some common cause Discuss
Correct Answer: Both the statements I and II are independent causes
Explanation:
The two statements discuss two separate statistical and generalised results.- 8. Statements: Applications of applicants who do no fulfil eligibility criteria and/or who do not submit applications before last date will be summarily rejected and will not be called for the written test.
Conclusions:
- Those who are called for the written test are those who fulfil eligibility criteria and have submitted their applications before last date.
- Written test will be held only after scrutiny of applications.
Options- A. Only conclusion I follows
- B. Only conclusion II follows
- C. Either I or II follows
- D. Neither I nor II follows
- E. Both I and II follow Discuss
Correct Answer: Both I and II follow
Explanation:
The statement clearly mentions that fulfilling the eligibility criteria and submitting the application before the stipulated date are both essential to avoid rejection. So, I follows. Also, since it is given that the candidates whose applications are rejected shall not be called for written test, so II also follows.- 9. Statements: I know nothing except the fact of my ignorance.
Conclusions:
- Writer's knowledge is very poor.
- The world of knowledge is too vast to be explored by a single person.
Options- A. Only conclusion I follows
- B. Only conclusion II follows
- C. Either I or II follows
- D. Neither I nor II follows
- E. Both I and II follow Discuss
Correct Answer: Only conclusion II follows
Explanation:
The statement is a symbolic one and only II correctly explains it.- 10.
If the first three statements are facts, which of the following statements must also be a fact?Fact 1: All dogs like to run. Fact 2: Some dogs like to swim. Fact 3: Some dogs look like their masters. I: All dogs who like to swim look like their masters. II: Dogs who like to swim also like to run. III: Dogs who like to run do not look like their masters.
Options- A. I only
- B. II only
- C. II and III only
- D. None of the statements is a known fact. Discuss
Correct Answer: II only
Explanation:
Statement II is the only true statement. Since all dogs like to run, then the ones who like to swim also like to run. There is no support for statement I or statement III.
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- 1. Statement: Should all the legislators be forced to resign from their profession?
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