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Home ‣ Logical Reasoning ‣ Logical Deduction See What Others Are Saying!
  • Question

  • Statements: All doors are roads. No road is fruit. Some flowers are doors.

    Conclusions:

    1. Some fruits are doors.
    2. Some fruits are flowers.
    3. Some roads are flowers.
    4. No fruit is flower.


  • Options
  • A. Only either II or III, and IV follow
  • B. Only either II or IV, and III follow
  • C. Only either II or IV, and I follow
  • D. Only either II or IV follows
  • E. All follow

  • Correct Answer
  • Only either II or IV, and III follow 

    Explanation
    All doors are roads. No road is fruit.

    Since both the premises are universal and one premise is negative, the conclusion must be universal negative and should not contain the middle term. So, it follows that 'No door is fruit.'

    Some flowers are doors. All doors are roads.

    Since one premise is particular, the conclusion must be particular and should not contain the middle term. So, it follows that 'Some flowers are roads'. Ill is the converse of this conclusion and so it holds.

    Some flowers are roads. No road is fruit.

    Since one premise is particular and the other negative, the conclusion must be particular negative and should not contain the middle term. So, it follows that 'Some flowers are not fruits'. II and IV involve the extreme terms and form a complementary pair. Thus, either II or IV follows.

    More questions

    • 1. Choose the picture that would go in the empty box so that the two bottom pictures are related in the same way as the top two:

    • Options
    • A. 1
    • B. 2
    • C. 3
    • D. 4
      • Discuss
    • 2. Which word does NOT belong with the others?

    • Options
    • A. couch
    • B. rug
    • C. table
    • D. chair
      • Discuss
    • 3. Which word does NOT belong with the others?

    • Options
    • A. eel
    • B. lobster
    • C. crab
    • D. shrimp
      • Discuss
    • 4. 14 14 26 26 38 38 50

    • Options
    • A. 60 72
    • B. 50 62
    • C. 50 72
    • D. 62 62
    • E. 62 80
      • Discuss
    • 5. All guilty politicians were arrested. Kishan and Chander were among those arrested.

    • Options
    • A. All politicians are guilty.
    • B. All arrested people are politicians.
    • C. Kishan and Chander were not politicians.
    • D. Kishan and Chander were guilty.
      • Discuss
    • 6. Statement: Is caste-based reservation policy in professional colleges justified?

      Arguments:

      1. Yes. The step is a must to bring the underprivileged at par with the privileged ones.
      2. No. It obstructs the establishment of a classless society.
      3. Yes. This will help the backward castes and classes of people to come out of the oppression of upper caste people.


    • Options
    • A. Only I and II are strong
    • B. Only II is strong
    • C. Only II and III are strong
    • D. Only I and III are strong
    • E. All are strong
      • Discuss
    • 7. Statement: 'Guests should be provided lunch.' - A tells B.

      Assumptions:

      1. Unless told, lunch may not be provided.
      2. Guests will stay during lunch time.


    • 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
    • 8. Which word does NOT belong with the others?

    • Options
    • A. dodge
    • B. flee
    • C. duck
    • D. avoid
      • Discuss
    • 9. Statement: Should agriculture in rural India be mechanized?

      Arguments:

      1. Yes. It would lead to higher production.
      2. No. Many villagers would be left unemployed.


    • 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
    • 10. 28 25 5 21 18 5 14

    • Options
    • A. 11 5
    • B. 10 7
    • C. 11 8
    • D. 5 10
    • E. 10 5
      • Discuss

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