Validity of syllogisms
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VALIDITY OF SYLLOGISMS. RULES ON VALIDITY. RULE 1: There must be three terms and no more. A. Major Premise: All deer have divided hooves. Minor Premise: Horses have hooves. Number of terms:. 4. B. All sweets attract ants. Julia is sweet. Therefore, Julia attracts ants. 4.

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VALIDITY OF SYLLOGISMS

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Validity of syllogisms

VALIDITY OF SYLLOGISMS

RULES ON VALIDITY


Rule 1 there must be three terms and no more

RULE 1: There must be three terms and no more.

A. Major Premise: All deer have divided hooves.

Minor Premise: Horses have hooves.

Number of terms:

4


Validity of syllogisms

B. All sweets attract ants.

Julia is sweet.

Therefore, Julia attracts ants.

4

Number of terms:

*sweet: food with sugar ( Major Premise)

a person’s characteristic (Minor Premise)


Validity of syllogisms

All stars are balls of gases.

David Cook is a star.

Therefore, David Cook is a ball of gas.

Number of terms:

4

*stars: heavenly body ( Major Premise)

popular person (Minor Premise)


Validity of syllogisms

All brave men do not fear anything.

Hiawatha is a brave man.

Therefore, Hiawatha does not fear anything.

Number of terms:

4

*brave: being courageous ( Major Premise)

warrior (Minor Premise)


Validity of syllogisms

All parties are joyful occasions.

Solidarity is a party.

Therefore, Solidarity is a joyful occasion.

Number of terms:

4

*party/ies: celebrations( Major Premise)

political group (Minor Premise)


Validity of syllogisms

All balls are elegant gatherings.

Mikasa is a ball.

Therefore, Mikasa is an elegant gathering.

Number of terms:

4

*ball/s: gatherings ( Major Premise)

round object (Minor Premise)


Validity of syllogisms

All books are managed by accountants.

English Arts and Skills is a book.

Therefore, English Arts and Skills is managed by an accountant.

Number of terms:

4

*book: financial records( Major Premise)

published work (Minor Premise)


Validity of syllogisms

All fibers are food nutrients.

A thread is a fiber.

Therefore, thread is a food nutrient.

Number of terms:

4

* fiber/s: food substance( Major Premise)

strand (Minor Premise)


Validity of syllogisms

All wards shelter the sick.

Soldiers are wards.

Therefore, soldiers shelter the sick.

Number of terms:

4

*ward/s: area in a hospital( Major Premise)

protectors (Minor Premise)


Validity of syllogisms

All speakers should express themselves confidently.

Logitech is a speaker.

Therefore, Logitech expresses itself confidently.

Number of terms:

4

*speaker/s: commentators, lecturers etc. ( Major Premise)

device that transmits sound (Minor Premise)


Rule 2 the middle term must be universal in at least one premise

RULE 2: The middle term must be universal in at least one premise.

Australian bushmen are human beings.

Queen Elizabethis a human being.

Therefore, Queen Elizabeth is an Australian

bushman.

Major term

Minor Term

Middle Term


Validity of syllogisms

*In every affirmative proposition, the predicate is particular.

Australian bushmen are human beings.

Queen Elizabeth is a human being.

Therefore, Queen Elizabeth is an Australian

bushman.

Middle term

Particular

Middle Term:

Particular


Validity of syllogisms

Valid Syllogism

All human beings are Australian bushmen.

Queen Elizabethis a human being.

Therefore, Queen Elizabeth is an Australian bushman.

Major term

Minor Term

Middle Term


Validity of syllogisms

Labor racketeers are opposed to the reform law.

Union presidents are opposed to the reform law.

Therefore, union presidents are labor racketeers.

Middle term

Middle Term:

Particular

Particular


Validity of syllogisms

Valid Syllogism

All people opposed to the reform law are labor racketeers.

Union presidentsare people opposed to the reform law.

Therefore, Union presidents are labor racketeers.

Major term

Minor Term

Middle Term


Validity of syllogisms

All OFWs

Nurses abroad

Therefore, nurses abroad are OFWs.

are our modern-day heroes.

are our modern-day heroes.

Middle term:

Particular

Middle term:

Particular


Validity of syllogisms

All OFWs

Nurses abroad

Therefore, nurses abroad are OFWs.

are our modern-day heroes.

are our modern-day heroes.

Middle term:

Particular

Middle term:

Particular


Validity of syllogisms

All OFWs

Nurses abroad

Therefore, nurses abroad are OFWs.

are our modern-day heroes.

are our modern-day heroes.

Middle term:

Particular

Middle term:

Particular


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