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- Question
Statements: All windows are doors. No door is wall.
Conclusions:
- No window is wall.
- No wall is door.
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
- Correct Answer
- Both I and II follow
ExplanationSince both the premises are universal and one premise is negative, the conclusion must be universal negative. Also, the conclusion should not contain the middle term. So, I follows. However, II is the converse of the second premise and thus it also holds, - 1. Statements: Some engineers are fools. Anand is an engineer.
Conclusions:
- Some fools are engineers.
- Anand is a fool.
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
- 2. Statements: Bureaucrats marry only intelligent girls. Tanya is very intelligent.
Conclusions:
- Tanya will marry a bureaucrat.
- Tanya will not marry a bureaucrat.
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
- 3. Statements: All pens are chalks. All chairs are chalks.
Conclusions:
- Some pens are chairs.
- Some chalks are pens.
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
- 4. Statements: All educated people read newspapers. Rahul does not read newspaper.
Conclusions:
- Rahul is not educated.
- Reading newspaper is not essential to be educated.
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
- 5. Statements: Some men are educated. Educated persons prefer small families.
Conclusions:
- All small families are educated.
- Some men prefer small families.
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
- 6. Statements: Most teachers are boys. Some boys are students.
Conclusions:
- Some students are boys.
- Some teachers are students.
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
- 7. Statements: No man is a donkey. Rahul is a man.
Conclusions:
- Rahul is not a donkey.
- All men are not Rahul.
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
- 8. Statements: Some books are pens. No pen is pencil.
Conclusions:
- Some books are pencils.
- No book is pencil.
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
- 9. Statements: All men are married. Some men are educated.
Conclusions:
- Some married are educated.
- Some educated are married.
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
- 10. Statements: All tubes are handles. All cups are handles.
Conclusions:
- All cups are tubes.
- Some handles are not cups.
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
Logical Deduction problems
Search Results
Correct Answer: Only conclusion I follows
Explanation:
Since the middle term 'engineer' is not distributed even once in the premises, no definite conclusion follows. However, I is the converse of the first premise and thus it holds.
Correct Answer: Either I or II follows
Explanation:
The data does not mention whether all intelligent girls are married to bureaucrats. So, either I or II may follow.
Correct Answer: Only conclusion II follows
Explanation:
Since the middle term 'chalks' is not distributed even once in the premises, no definite conclusion follows. However, II is the converse of the first premise and so it holds.
Correct Answer: Only conclusion I follows
Explanation:
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, only I follows.
Correct Answer: Only conclusion II follows
Explanation:
Since one premise is particular, the conclusion must be particular and should not contain the middle term. Thus, only II follows.
Correct Answer: Only conclusion I follows
Explanation:
Since both the premises are particular, no definite conclusion follows. However, I is the converse of the second premise and thus it holds.
Correct Answer: Only conclusion I follows
Explanation:
Since on premise is negative, the conclusion must be negative. Conclusion II cannot follow as it contains the middle term. So, only I follows.
Correct Answer: Either I or II follows
Explanation:
As discussed above, the conclusion must be particular negative and should not contain the middle term. So, it follows that 'Some books are not pencils'. However, I and II involve only the extreme terms and form a complementary pair. Thus, either I or II follows.
Correct Answer: Both I and II follow
Explanation:
Since one premise is particular, the conclusion must be particular and should not contain the middle term. So, I follows. II is the converse of I and thus it also holds.
Correct Answer: Neither I nor II follows
Explanation:
Both the premises are A type propositions. So, in either, the middle term 'handles' forming the predicate is not distributed. Since the middle term is not distributed even once in the premises, no definite conclusion follows
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