UGC NET Paper 1 • Concept 5
Distribution of Terms
Unit 6 • Chapter 1
Understanding Term Coverage in Logic
Topic 5: When Terms Apply to All vs. Some Members
📖 Based on Ankit Sharma's Book
UGC NET Paper 1 Volume 5 - Logical Reasoning Unlocked
📚 NerdSchool Study Materials
UGC NET Paper 1 - Distribution of Terms
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CONCEPT 5
What is Distribution?
Understanding Term Coverage
📖 What is Distribution?
Distribution refers to whether a statement applies to all members of a group (Distributed) or only some members (Undistributed).
🔍 Understanding the Concept
✅ Distributed Term
A term is distributed when the statement refers to ALL members of that class or group.
Example: "All dogs are animals" → The term "dogs" is distributed because we're talking about ALL dogs.
❌ Undistributed Term
A term is undistributed when the statement refers to only SOME members of that class or group.
Example: "All dogs are animals" → The term "animals" is undistributed because we're NOT talking about ALL animals, only some.
📊 Visual Comparison
DISTRIBUTED
Refers to every member of the group
UNDISTRIBUTED
Refers to only some members of the group
💡 Simple Example to Remember:
"All students passed the exam."
- Students → Distributed (We're talking about ALL students)
- Passed → Undistributed (Not ALL people who passed, just these students)
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Distribution Rules: A & E
Universal Propositions
A Universal Affirmative (All S are P)
"All S are P"
SUBJECT (S)
DISTRIBUTED
Applies to ALL S
PREDICATE (P)
UNDISTRIBUTED
Does NOT apply to ALL P
📝 Example:
"All cats are mammals."
- Subject "cats" → Distributed (ALL cats)
- Predicate "mammals" → Undistributed (NOT all mammals, only some)
📌 Rule for A: Subject is distributed, Predicate is undistributed.
E Universal Negative (No S are P)
"No S are P"
SUBJECT (S)
DISTRIBUTED
Applies to ALL S
PREDICATE (P)
DISTRIBUTED
Applies to ALL P
📝 Example:
"No birds are fish."
- Subject "birds" → Distributed (ALL birds)
- Predicate "fish" → Distributed (ALL fish are excluded)
📚 Critical Exam Point: In Universal Negative Proposition, both the terms are distributed. Asked in Exam
📌 Rule for E: BOTH Subject and Predicate are distributed.
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Distribution Rules: I & O
Particular Propositions
I Particular Affirmative (Some S are P)
"Some S are P"
SUBJECT (S)
UNDISTRIBUTED
Only SOME S
PREDICATE (P)
UNDISTRIBUTED
Only SOME P
📝 Example:
"Some birds are mammals."
- Subject "birds" → Undistributed (Only SOME birds)
- Predicate "mammals" → Undistributed (Only SOME mammals)
📚 Critical Exam Point: In a proposition which is particular affirmative, neither the subject nor the predicate is distributed. Asked in Exam
Exam Example: "Some birds are mammals" is a particular affirmative proposition and it distributes neither subject term nor predicate term. Asked in Exam
📌 Rule for I: NEITHER Subject NOR Predicate is distributed.
O Particular Negative (Some S are not P)
"Some S are not P"
SUBJECT (S)
UNDISTRIBUTED
Only SOME S
PREDICATE (P)
DISTRIBUTED
Excluded from ALL P
📝 Example 1:
"Some girls are not students."
- Subject "girls" → Undistributed (Only SOME girls)
- Predicate "students" → Distributed (Excluded from ALL students)
📚 Critical Exam Point: Asked in Exam
Example: "Some girls are not students" — Here Predicate term students is distributed and Subject term girls is undistributed.
Example: "Some men are not married" — here the predicate is distributed.
📌 Rule for O: Subject is undistributed, Predicate is distributed.
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🧠 The ASEBINOP Memory Trick
Never Forget Distribution Rules!
🎯 Master This Pattern: ASEBINOP
This simple pattern tells you which terms are distributed in each proposition type:
A
Subject only
S P
S
(Stands for Subject)
E
Both
S P
B
(Stands for Both)
I
Neither
S P
N
(Stands for Neither)
O
Predicate only
S P
P
(Stands for Predicate)
📊 Quick Visual Summary
A
Subject only
E
Both
I
Neither
O
Predicate only
💡 Pro Tip: Just remember "ASEBINOP" and you'll instantly know which terms are distributed in any proposition! This trick has helped thousands of students ace their exams.
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📝 Practical Inference Example
Applying Distribution in Syllogisms
🎯 Exam Example: EAE Syllogism
Premise 1 (E)
No musicians are Greeks.
Premise 2 (A)
All traders are Musicians.
Therefore
Conclusion (E)
No traders are Greeks.
Mood of this Syllogism
E + A + E = EAE
🔍 Step-by-Step Distribution Analysis
1
Identify the conclusion type
The conclusion is: "No traders are Greeks"
This is an E proposition (Universal Negative)
2
Apply ASEBINOP rule for E
According to ASEBINOP: E = Both
In an E proposition, both terms are distributed
3
Identify the terms in the conclusion
Minor Term (Subject)
traders
DISTRIBUTEDMajor Term (Predicate)
Greeks
DISTRIBUTED✅ Final Answer:
Therefore, the minor term of the conclusion is distributed. Asked in Exam
💡 Key Takeaway: When analyzing conclusions in syllogisms, always check the proposition type first (A, E, I, or O), then apply the ASEBINOP rule to determine which terms are distributed. This is a common exam question pattern!
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📝 Complete Summary
Distribution Rules at a Glance
🎯 Critical Exam Points to Remember
- E Proposition: Both terms are distributed Asked in Exam
- I Proposition: Neither subject nor predicate is distributed Asked in Exam
- O Proposition: Predicate is distributed, Subject is undistributed Asked in Exam
- ASEBINOP: The ultimate memory trick for all distributions
- Distribution = Whether a term applies to ALL or SOME members
🧠 Final Memory Pattern
A
S only
E
Both
I
Neither
O
P only
A-S-E-B-I-N-O-P
Master this pattern and you'll never forget distribution rules!
Based on Ankit Sharma's Book - UGC NET Paper 1 Volume 5
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