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- Question
- Statements:
(a) All books are novels.
(b) Some novels are poems.
Conclusions:
(I) Some books are poems.
(II) Some poems are novels.
Options- A. Only conclusion (II) follows
- B. Neither conclusion (I) nor (II) follows
- C. Both conclusions (I) and (II) follow
- D. Only conclusion (I) follows
- Correct Answer
- Only conclusion (II) follows
ExplanationFirst Premise in Universal Affirmative (A - type).
Second Premise is Particular Affirmative (I - type).
All books are novels. ? Some novels are poems.
A + I ? No Conclusion
Conclusion II is Converse of the second Premise. - 1. Two statements are followed by alternatives. Mark the correct alternative that follows :
All Asians are wise.
All Chinese are Asian Therefore,
Options- A. Some Chinese are wise
- B. All wise are Chinese
- C. All Chinese are wise
- D. No conclusion follows Discuss
- 2. Statement:
Some roads are ponds.
All ponds are stores.
Some stores are bags.
Conclusions:
I. Some bags are ponds.
II. Some stores are roads.
Options- A. if conclusion I follow
- B. if conclusion II follows
- C. if either conclusion I or II follows
- D. if neither conclusion I nor II follows Discuss
- 3. Statement:
All rats are bats.
Some bats are desks.
All desks are chairs.
Conclusions:
I. Some desks are rats.
II. Some chair are rats.
Options- A. if conclusion I follow
- B. if conclusion II follows
- C. if either conclusion I or II follows
- D. if neither conclusion I nor II follows Discuss
- 4. Statement:
Some buildings are benches.
Some sofas are benches.
Some benches are sofas.
Conclusions:
I. Some tables are sofas.
II. No table is sofa.
Options- A. if conclusion I follow
- B. if conclusion II follows
- C. if either conclusion I or II follows
- D. if neither conclusion I nor II follows Discuss
- 5. Statement:
Some cats are dogs.
All dogs are goats.
All goats are walls.
Conclusions:
I. Some walls are dogs.
II. Some walls are cats.
Options- A. if conclusion I follow
- B. if conclusion II follows
- C. if either conclusion I or II follows
- D. if neither conclusion I nor II follows Discuss
- 6. Statements:
I. Some birds are clouds.
II. Horse is a bird.
Conclusions:
I. Some clouds are birds.
II. Horse is not a cloud.
Options- A. Conclusion I follows.
- B. Conclusion II follows.
- C. Either conclusion I or II follows.
- D. Neither conclusion I nor II follows. Discuss
- 7. Statements:
(a) Some politicians are social workers.
(b) All doctors are social workers.
Conclusions:
I. Some doctors are politicians
II. Some social workers are doctors as well as politicians
Options- A. Neither Conclusion I nor II follows.
- B. Only Conclusion II follows.
- C. Both Conclusions I and II follow.
- D. Only Conclusion I follows. Discuss
- 8. Statements:
All University Professors have a doctorate degree. X is a lady professor.
Conclusions:
I. X does not have a Doctorate degree.
II. Only men Professors have a Doctorate degree.
Options- A. Both I & II follow
- B. Only I follows
- C. Neither I nor II follows
- D. Only II follows Discuss
- 9. Statement:
All philosophers are men. Socrates was a philosopher. Conclusion:
I. Socrates was a man.
II. Women cannot become philosophers.
Options- A. Only I is valid
- B. Only II is valid
- C. Both are not valid
- D. Both are valid Discuss
- 10. No monkey can sing but some monkeys can talk.
If the above statement is correct, then which of the following is correct?
Options- A. Some monkeys may sing
- B. All monkeys can't sing
- C. All monkeys can't talk
- D. All monkeys can talk Discuss
Syllogism problems
Search Results
Correct Answer: All Chinese are wise
Explanation:
Since both the Premises are Universal Affirmative (A - type) and these can be aligned by changing the order of Premises, the Conclusion should be Universal Affirmative.
All Chinese are Asians. ? All Asians are wise.
Therefore, All Chinese are wise. This is conclusion (3).
Here, it should be noted that the Conclusion given in option (1) is the implication of the derived Conclusion and hence it is also valid.
Correct Answer: if conclusion II follows
Explanation:
All ponds are stores + Some stores are bags = I + A = No conclusion Hence I does not follow. Some roads are ponds + All ponds are stores = I + A = I = Some roads are stores ? conversion ? Some stores are roads (I) Hence II follows.
Correct Answer: if neither conclusion I nor II follows
Explanation:
All rats are bats + Some bats are desks = I + A = No conclusion Hence I and subsequently II do not follow.
Correct Answer: if either conclusion I or II follows
Explanation:
Some sofas are benches + Some benches are tables = I + I = No conclusion. Hence I and II do not follow by combination. However, since they make a complementary E-I pair, either of the two must follow.
Correct Answer:
Explanation:
All dogs are goats + All goats are walls = A + A = A = All dogs are walls. (I) Hence I follows. Some cats are dogs + All dogs are walls = 1 + A = I = Some cats are wall ? conversion ? Some walls are cats. (I) Hence II follows.
Correct Answer: Conclusion I follows.
Explanation:
Statement I is Particular Affirmative (I-type)
Statement II is Universal Affirmative (A-type).
Horse is a bird. ? Some birds are clouds.
A + I ? No Conclusion
Conclusion I is Converse of the Statement I.
Correct Answer: Neither Conclusion I nor II follows.
Explanation:
First Premise is Particular Affirmative (I ? type).
Second Premise is Universal Affirmative (A ? type).
All doctors are social workers. ? Some social workers are politicians.
A + I ? No Conclusion.
Correct Answer: Neither I nor II follows
Explanation:
Both the premises are Universal Affirmative. We can align the premises by changing their order. Thus,
X is a lady professor. ? All University professors have a doctorate degree.
We know that,
A + A ? A - type conclusion. Thus our derived conclusion would be "X has a doctorate degree".
Correct Answer: Both are valid
Explanation:
All philosophers without exception are men. So no woman can be philosopher.
Correct Answer: All monkeys can't sing
Explanation:
Clearly, all monkeys cannot sign.
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