English and Logical Reasoning Prep Guide
- Exam
- English and Logical Reasoning Prep Guide
- Subject
- Logical Reasoning
- Chapter
- Logical Deduction
English and Logical Reasoning Prep Guide · Logical Reasoning · Logical Deduction
Directions : In question, some statements are given, followed by...
Directions : In question, some statements are given, followed by two conclusions I and II. You have to consider the statements to be true, even if they seem to be at variance from commonly known facts. You have to decide which of the given conclusions, if any, follow from the given statements. Indicate your answer.
Statements :
No man is a monkey.
John is a man.
Conclusions :
I. John is not a monkey.
II. John may be a monkey.
Options
- AIf only conclusion I follows.
- BIf only conclusion II follows.
- CIf either I or II follows.
- DIf neither I nor II follows.
Correct answer
A. If only conclusion I follows.
Step-by-step solution
Checking C1 : John is not a monkey.
Using S2 and S1, we get
John is a man (A) + No man is a monkey (E) → John is not a monkey. Clearly, C1 follows.
Checking C2 : John may be a monkey.
In C1, we have already found that John is not a monkey is a definite conclusion and therefore John may be a monkey is not a possible preposition. C2, hence, doesn't follow.
Option A is hence the correct answer.