Verbal Reasoning by Dr. R S Aggarwal – Logical reasoning – Quantifier Subject Copula Predicate.
Verbal Reasoning by Dr. R S Aggarwal – Logical reasoning – Quantifier Subject Copula Predicate.
Here’s a focused explanation and guide based on Verbal Reasoning by Dr. R.S. Aggarwal, particularly from the chapter on Logical Reasoning—specifically the structure of standard categorical statements using:
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Quantifier – Subject – Copula – Predicate (Q – S – C – P)
This format helps break down logical statements into components, which is essential for solving syllogism-type questions.
1. Basic Structure of Logical Statements:
A standard statement in logical reasoning follows:
Quantifier + Subject + Copula + Predicate
Component | Function | Examples |
---|---|---|
Quantifier | Tells how much or how many | All, Some, No |
Subject | The main person or thing | men, dogs, students |
Copula | A linking verb | is/are/was/were |
Predicate | Tells something about subject | doctors, intelligent, athletes |
Example 1:
Statement: All men are mortal.
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Quantifier: All
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Subject: men
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Copula: are
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Predicate: mortal
Structure: All + men + are + mortal
Example 2:
Statement: No student is lazy.
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Quantifier: No
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Subject: student
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Copula: is
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Predicate: lazy
Structure: No + student + is + lazy
Example 3:
Statement: Some cats are black.
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Quantifier: Some
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Subject: cats
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Copula: are
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Predicate: black
Structure: Some + cats + are + black
2. Standard Forms of Categorical Propositions:
Type | Symbol | Form | Example |
---|---|---|---|
A | Universal Affirmative | All S are P | All boys are smart. |
E | Universal Negative | No S are P | No girls are rude. |
I | Particular Affirmative | Some S are P | Some teachers are kind. |
O | Particular Negative | Some S are not P | Some students are not lazy. |
3. Why Learn Q-S-C-P?
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Helps in identifying valid syllogisms
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Crucial for Venn diagram-based reasoning
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Makes it easy to convert or infer statements
Conversions Based on Structure:
Original Statement | Converse Form |
---|---|
All A are B | Some B are A (not always valid) |
No A is B | No B is A (valid) |
Some A are B | Some B are A (valid) |
Some A are not B | Conversion not valid |
Practice Questions:
Q1. Break down the statement: Some engineers are not creative.
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Quantifier: Some
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Subject: engineers
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Copula: are not
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Predicate: creative
Type: O – Particular Negative
Q2. What type is the following: No dogs are reptiles.
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Quantifier: No
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Subject: dogs
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Copula: are
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Predicate: reptiles
Type: E – Universal Negative
R.S. Aggarwal Book Reference:
You’ll find this in:
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Part II: Logical Deduction
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Chapter: Logic (Statements and Conclusions / Syllogism)
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Exercises include:
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Direct Q-S-C-P identification
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Syllogism MCQs
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Venn diagram conclusions
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Want to practice more?
I can give you:
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PDF worksheet with 20 questions
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Interactive quiz
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Video explanation script or animation idea
Let me know how you’d like to continue your learning!