Syllogism Logical Reasoning-Deductive Syllogism is a form of deductive reasoning where you arrive at a specific conclusion by examining two other premises or ideas. Syllogism derives from the Greek word syllogismos, meaning conclusion or inference. Some syllogisms contain three components: Major Premise Minor Premise Conclusion

1. SYLLOGISM
Siva Prasath T R
UGC Junior Research Fellow
Department of Social Work
Pondicherry Central University
SIVA
PRASATH
T
R
Siva Prasath T R (UGC Junior Research Fellow)
Department of Social Work , Pondicherry Central University
sivaprasathtr@gmail.com , 9500436023
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2. Plan for the day
Basic idea
Structure
How to draw Venn diagram?
Examples
SIVA
PRASATH
T
R
Siva Prasath T R (UGC Junior Research Fellow)
Department of Social Work , Pondicherry Central University
sivaprasathtr@gmail.com , 9500436023
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3. How the structure will be?
Syllogism
Precise(statement)
Major Minor
Conclusion
SIVA
PRASATH
T
R
Siva Prasath T R (UGC Junior Research Fellow)
Department of Social Work , Pondicherry Central University
sivaprasathtr@gmail.com , 9500436023
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4. Fundamental rule
There must be three terms.
Eg 1
All cats are rats
All cats are white
Conclusion
All cats are white
(There must be common term in statement as well as conclusion)
Eg 2
All cats are rats
All tigers are dogs
No conclusion
SIVA
PRASATH
T
R
Siva Prasath T R (UGC Junior Research Fellow)
Department of Social Work , Pondicherry Central University
sivaprasathtr@gmail.com , 9500436023
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5. Eg 3
• All cats are rats
• All rats are dogs
Conclusion
• All cats are dogs
Eg 4
• All cats are rats
• All cats are dogs
Conclusion
• All rats are dogs
SIVA
PRASATH
T
R
Siva Prasath T R (UGC Junior Research Fellow)
Department of Social Work , Pondicherry Central University
sivaprasathtr@gmail.com , 9500436023
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6. Eg 5
• All cats are rats
• Some dogs are cats
Conclusion
• Some dogs are rats
Eg 6
• All rats are cats
• Some dogs are cats
Conclusion
• Some dogs are rats
SIVA
PRASATH
T
R
Siva Prasath T R (UGC Junior Research Fellow)
Department of Social Work , Pondicherry Central University
sivaprasathtr@gmail.com , 9500436023
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7. Eg 7
• No cats are rats
• All dogs are cats
Conclusion
• No dogs are rats
Eg 8
• No cats are rats
• All cats are dogs
Conclusion
• No dogs are rats
SIVA
PRASATH
T
R
Siva Prasath T R (UGC Junior Research Fellow)
Department of Social Work , Pondicherry Central University
sivaprasathtr@gmail.com , 9500436023
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8. Eg 9
• All rats are dogs
• No dogs are cats
Conclusion
• No cats are rats
Eg 10
• All dogs are rats
• No dogs are cats
Conclusion
• No cats are ratsSIVA
PRASATH
T
R
Siva Prasath T R (UGC Junior Research Fellow)
Department of Social Work , Pondicherry Central University
sivaprasathtr@gmail.com , 9500436023
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9. Eg 11
• Some dogs are not rats
• All dogs are cats
Conclusion
• Some cats are not rats
Eg 12
• Some dogs are not rats
• All cats are dogs
Conclusion
• Some cats are not rats
SIVA
PRASATH
T
R
Siva Prasath T R (UGC Junior Research Fellow)
Department of Social Work , Pondicherry Central University
sivaprasathtr@gmail.com , 9500436023
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10. Eg 13
• All rats are dogs
• Some cats are not dogs
Conclusion
• Some cats are not rats
Eg 14
• All dogs are rats
• Some cats are not dogs
Conclusion
• Some cats are not ratsSIVA
PRASATH
T
R
Siva Prasath T R (UGC Junior Research Fellow)
Department of Social Work , Pondicherry Central University
sivaprasathtr@gmail.com , 9500436023
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11. Eg 15
• No rats are dogs
• Some cats are dogs
Conclusion
• Some cats are not rats
SIVA
PRASATH
T
R
Siva Prasath T R (UGC Junior Research Fellow)
Department of Social Work , Pondicherry Central University
sivaprasathtr@gmail.com , 9500436023
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12. Thank You All !!
SIVA
PRASATH
T
R
Siva Prasath T R (UGC Junior Research Fellow)
Department of Social Work , Pondicherry Central University
sivaprasathtr@gmail.com , 9500436023
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