Study@Night: Syllogism

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Study@Night: Syllogism

Directions (Q. 1-13): In each of these questions, there are two conclusions I and II. Assume the statements to be true even if they vary with facts. Choose your answer as

1) if only conclusion I follows.

2) if only conclusion II follows.

3) if either conclusion I or conclusion II follows.

4) if neither conclusion I nor II follows.

5) if both conclusions I and II follow.

(1-2):
Statements: Some weeks are years.
All months are weeks.
All years are decades.
No hour is a month.

1. Conclusions: I. All hours being decades is a possibility.

II. Some hours can never be years.

2. Conclusions: I. All decades being weeks is a possibility.

II. All hours, if they are months, cannot be decades.

(3-4):
Statements: All elections are dramas.
All elections are stories.
Some dramas are not films.

3. Conclusions: I. No film is a story.

II. Some films which are dramas are also stories.

4. Conclusions: I. All films being elections is a possibility.

II. Some stories which are not elections are dramas.

5. Statements: No spade is a club.
All clubs are diamonds.
All spades are hearts.

Conclusions: I. Some spades which are diamonds may also be clubs.

II. Some hearts, if they are clubs, must be diamonds.

6. Statements: All roads are drivers.
Some drivers are pilots
Some walkers are not drivers.

Conclusions: I. Some roads being pilots is a possibility.

II. All walkers are pilots.

(7-8):
Statements: All stars are galaxies.
No planet is sun.
Some galaxies are suns.

7. Conclusions: I. All sun being stars is a possibility.

II. Some stars are galaxies.

8. Conclusions: I. No galaxy is a planet.

II. Some planets are galaxies.

(9-10):
Statements: No RNA is DNA.
Some cells are tissues.
All DNA are cells.

9. Conclusions: I. All DNAs are tissues.

II. Some cells are definitely not RNA.

10. Conclusions: I. All RNAs being cells is a possibility.

II. All cells being RNA is a possibility.

11. Statements: Some stains are dirts.
All dirts are shines.
No stain is dull.

Conclusions: I. All dull being dirts is a possibility.

II. All shines are stains.

(12-13):
Statements: Some coffee are cups.
Some cups are not copies.
All colds are coffee.

12. Conclusions: I. Some coffee are not copies.

II. All colds are cups.

13. Conclusions: I. There is a possibility that no cups are coffee.

II. There is a possibility that all coffee are cold.

Answers:

  1. 1
  2. 1
  3. 4
  4. 1
  5. 2
  6. 1
  7. 5
  8. 3
  9. 2
  10. 1
  11. 1
  12. 4
  13. 2

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