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Basic Conclusion Identification

Introduction

In logical deduction, identifying which conclusion definitely follows from given statements is one of the most essential skills. It helps in distinguishing between what is logically implied and what is merely possible or imagined.

This pattern forms the foundation for reasoning-based aptitude questions, where candidates must evaluate conclusions based only on the information given - no assumptions allowed.

Pattern: Basic Conclusion Identification

Pattern

Identify which conclusion necessarily follows from the given statements - not what could or might follow.

In this pattern, the word “follows” means logically valid beyond doubt. If the conclusion can be false even in one scenario, it does not follow.

Step-by-Step Example

Question

Statements:
1️⃣ All roses are flowers.
2️⃣ Some flowers are red.

Conclusions:
I. All roses are red.
II. Some roses may be red.

Which of the following options is correct?

Options:
A. Only Conclusion I follows
B. Only Conclusion II follows
C. Both I and II follow
D. Neither I nor II follows

Solution

  1. Step 1: Understand given statements

    “All roses are flowers” → every rose belongs to the flower group.
    “Some flowers are red” → there exist red flowers, but not necessarily roses.

  2. Step 2: Test each conclusion

    (I) All roses are red - ❌ Cannot be said. The data doesn’t state that all flowers are red.
    (II) Some roses may be red - ✅ Possible and consistent with the statements.

  3. Step 3: Apply definite-follow rule

    Only conclusion II logically follows, as it fits without contradiction.

  4. Final Answer:

    Only Conclusion II follows → Option B

  5. Quick Check:

    If all roses are flowers, and some flowers are red, roses could be red - valid possibility, not certainty ✅

Quick Variations

1. When two or more conclusions are given - evaluate each separately.

2. Questions mixing “all”, “some”, and “no” require scope interpretation.

3. Conclusions with “can be” or “may be” express possibility - not definiteness.

Trick to Always Use

  • Step 1: Focus only on what’s directly stated, not assumptions.
  • Step 2: Test each conclusion independently.
  • Step 3: If even one case makes it false, it does not follow.

Summary

Summary

  • Always verify if the conclusion must be true, not possibly true.
  • Handle “All”, “Some”, and “No” with exact logical meanings.
  • Judge conclusions independently before deciding which follows.
  • Use logical necessity, not linguistic assumption.

Example to remember:
Statements: All birds are animals. Some animals can fly.
Valid conclusion: Some birds may fly - but not all birds are flyers.

Practice

(1/5)
1. Statements: All apples are fruits. All fruits are edible. Conclusions: I. All apples are edible. II. All edible things are apples. Which of the following options is correct?
easy
A. Only Conclusion I follows
B. Only Conclusion II follows
C. Both I and II follow
D. Neither I nor II follows

Solution

  1. Step 1: Understand given statements

    All apples are fruits, and all fruits are edible → Apples ⊂ Fruits ⊂ Edible.

  2. Step 2: Test each conclusion

    I. All apples are edible → ✅ True through transitive relation.
    II. All edible things are apples → ❌ Reverses the relation, not necessarily true.

  3. Step 3: Apply definite-follow rule

    Only Conclusion I necessarily follows.

  4. Final Answer:

    Only Conclusion I follows → Option A

  5. Quick Check:

    If apples are fruits and fruits are edible, apples must be edible ✅
Hint: Follow transitive logic - if A ⊂ B and B ⊂ C ⇒ A ⊂ C.
Common Mistakes: Reversing logic and assuming all edible items are apples.
2. Statements: All teachers are educated. Some educated people are scientists. Conclusions: I. Some teachers may be scientists. II. Some scientists are teachers. Which of the following options is correct?
easy
A. Only Conclusion I follows
B. Only Conclusion II follows
C. Both I and II follow
D. Neither I nor II follows

Solution

  1. Step 1: Decode statements

    Teachers ⊂ Educated, and some Educated ⊂ Scientists.

  2. Step 2: Check conclusions

    I. Some teachers may be scientists → ✅ Possible since teachers are part of educated group.
    II. Some scientists are teachers → ❌ Not necessarily true - direction not confirmed.

  3. Step 3: Apply logical necessity

    Only the first conclusion logically follows.

  4. Final Answer:

    Only Conclusion I follows → Option A

  5. Quick Check:

    Teachers belong to educated group that overlaps with scientists → possibility valid ✅
Hint: ‘Some may be’ is valid only when there’s overlap possibility, not direction reversal.
Common Mistakes: Assuming reverse relationship between scientist and teacher.
3. Statements: Some cats are animals. All animals are living beings. Conclusions: I. All cats are living beings. II. Some living beings are cats. Which of the following options is correct?
easy
A. Only Conclusion I follows
B. Only Conclusion II follows
C. Both I and II follow
D. Neither I nor II follows

Solution

  1. Step 1: Decode data

    Some cats ⊂ Animals, and all Animals ⊂ Living beings.

  2. Step 2: Test conclusions

    I. All cats are living beings → ❌ We don’t know if all cats are animals; only some are.
    II. Some living beings are cats → ✅ True, as some cats are part of living beings.

  3. Step 3: Logical conclusion

    Only Conclusion II follows logically.

  4. Final Answer:

    Only Conclusion II follows → Option B

  5. Quick Check:

    “Some cats are animals → animals are living → some living are cats” ✅
Hint: For ‘Some’ statements, the overlap carries forward, but not universally.
Common Mistakes: Assuming all ‘Some’ means ‘All’.
4. Statements: All engineers are logical. Some logical people are artists. Conclusions: I. Some engineers are artists. II. All artists are logical. Which of the following options is correct?
medium
A. Only Conclusion I follows
B. Only Conclusion II follows
C. Both I and II follow
D. Neither I nor II follows

Solution

  1. Step 1: Interpret data

    Engineers ⊂ Logical, and Some Logical ⊂ Artists.

  2. Step 2: Evaluate conclusions

    I. Some engineers are artists → ❌ No overlap given.
    II. All artists are logical → ❌ Not confirmed; only ‘some’ logical people are artists.

  3. Step 3: Conclusion check

    None of the conclusions are definite.

  4. Final Answer:

    Neither I nor II follows → Option D

  5. Quick Check:

    No direct or transitive connection proving any definite overlap ✅
Hint: Never assume intersection without direct statement support.
Common Mistakes: Assuming ‘some’ implies overlap with all.
5. Statements: No dog is a cat. All cats are animals. Conclusions: I. No dog is an animal. II. Some animals are cats. Which of the following options is correct?
medium
A. Only Conclusion I follows
B. Only Conclusion II follows
C. Both I and II follow
D. Neither I nor II follows

Solution

  1. Step 1: Interpret given statements

    No dog ⊂ Cat; All cats ⊂ Animals.

  2. Step 2: Check conclusions

    I. No dog is an animal → ❌ Not true; nothing said about dogs vs animals.
    II. Some animals are cats → ✅ Directly from ‘All cats are animals’.

  3. Step 3: Logical evaluation

    Only the second conclusion follows logically.

  4. Final Answer:

    Only Conclusion II follows → Option B

  5. Quick Check:

    All cats are animals → naturally some animals are cats ✅
Hint: ‘All X are Y’ always implies ‘Some Y are X’.
Common Mistakes: Assuming negative relation extends beyond scope.

Mock Test

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