Question 1

Statements:
1. All teachers are educated.
2. Some educated people are writers.

Conclusion: Some teachers are writers.

Which of the following is true?
A) The conclusion definitely follows.
B) The conclusion does not follow.
C) The conclusion is partially true.
D) The conclusion is true only for some teachers.

Accepted Answer

The conclusion does NOT logically follow. From 'All teachers are educated' and 'Some educated people are writers,' we cannot determine whether any teachers are among those educated people who are writers. The educated people who are writers may be a completely different subset from teachers.

Question 2

Statements:
1. All fruits are healthy.
2. All apples are fruits.

Conclusion: All apples are healthy.

Which of the following is true?
A) The conclusion definitely follows.
B) The conclusion does not follow.
C) The conclusion is true only for some apples.
D) The conclusion may or may not follow.

Accepted Answer

The conclusion DEFINITELY FOLLOWS. This is a classic valid syllogism: All apples are fruits (Premise 2) → All fruits are healthy (Premise 1) → Therefore, all apples are healthy. The chain of inclusion is unbroken: Apples ⊆ Fruits ⊆ Healthy.

Question 3

Statements:
1. Some students are athletes.
2. All athletes are disciplined.

Conclusion: Either all students are disciplined OR some students are not disciplined.

Which of the following is true?
A) The conclusion definitely follows.
B) The conclusion does not follow.
C) The conclusion is partially true.
D) The conclusion is true for some students.

Accepted Answer

The conclusion DEFINITELY FOLLOWS. This is an 'Either/Or' (disjunction) conclusion. From the premises: Some students are athletes (Premise 1) and all athletes are disciplined (Premise 2), we know at least some students ARE disciplined. However, we do NOT know if ALL students are athletes—so some students may not be athletes and thus may not be disciplined. Therefore, the disjunction 'Either all students are disciplined OR some students are not disciplined' must be true (at least one part is true).

Question 4

Statements:
1. No reptiles are mammals.
2. All snakes are reptiles.

Conclusion: No snakes are mammals.

Which of the following is true?
A) The conclusion definitely follows.
B) The conclusion does not follow.
C) The conclusion is true only for some snakes.
D) The conclusion may or may not follow.

Accepted Answer

The conclusion DEFINITELY FOLLOWS. This is a valid syllogism with a negative premise: No reptiles are mammals (Premise 1) and All snakes are reptiles (Premise 2) logically entail No snakes are mammals. The chain is: Snakes ⊆ Reptiles, and Reptiles ∩ Mammals = ∅, therefore Snakes ∩ Mammals = ∅.

Question 5

Read the following statements carefully and answer the question.

Statements:
1. All teachers are educators.
2. Some educators are researchers.
3. No researchers are administrators.

Which of the following conclusions is definitely true?

A) All teachers are researchers.
B) Some teachers are researchers OR Some teachers are not researchers.
C) No teachers are administrators.
D) All educators are teachers.

Accepted Answer

This is a syllogism question testing the ability to derive valid conclusions from given premises using logical rules. The correct answer is B because it presents an 'Either/Or' conclusion that must be true regardless of the specific relationship between teachers and researchers.

Question 6

Statements:
1. No artists are accountants.
2. All accountants are professionals.
3. Some professionals are teachers.

Conclusions:
I. Some teachers are accountants.
II. No artists are professionals.
III. Some professionals are not artists.

Which conclusions logically follow?

Accepted Answer

This question tests the ability to handle negative premises and derive conclusions involving multiple categories in a three-term syllogism.

Question 7

Statements:
1. All engineers are problem-solvers.
2. No problem-solvers are lazy.
3. Some employees are engineers.

Conclusions:
I. Some employees are not lazy.
II. All employees are problem-solvers.
III. Either all engineers are employees, or no engineers are employees.

Which of the following is true?

Accepted Answer

This question tests the ability to work with mixed quantifiers and evaluate an 'Either/Or' conclusion, which is characteristic of medium-difficulty syllogism problems.

Question 8

Statements:
1. Some athletes are vegetarians.
2. All vegetarians are health-conscious.
3. No health-conscious person is reckless.

Conclusions:
I. Some athletes are not reckless.
II. All athletes are health-conscious.
III. Some reckless people are not vegetarians.

Which conclusions logically follow?

Accepted Answer

This question tests the ability to chain multiple premises and identify valid conclusions while avoiding overgeneralization from 'some' statements.

Question 9

Read the following statements carefully and answer the question.

Statement 1: All philosophers are rational thinkers.
Statement 2: Some rational thinkers are not scientists.
Statement 3: No scientist is irrational.

Which of the following conclusions logically follows from the above statements?

A) All philosophers are scientists.
B) Some philosophers are not scientists, OR all philosophers are scientists.
C) Some philosophers are scientists.
D) No philosopher is a scientist.

Accepted Answer

This is a hard-level syllogism question testing the student's ability to derive valid conclusions from three premises and evaluate disjunctive (Either/Or) conclusions. The correct answer requires understanding that while we cannot definitively prove all philosophers are scientists, we also cannot prove some philosophers are not scientists—making the disjunctive statement the only logically sound conclusion.

IBPS RRB PO Syllogism

Syllogism— Rules & Concept

Key Points to Remember

Exam-Specific Tips

Syllogism — Practice Questions

60-Second Revision — Syllogism