General Logic Module 2 Flashcards
Subject
Whales
Predicate
Mammals
Copula
Are
A (Universal Affirmative)
All dogs are mammals
E ( Universal Negative) / (Singular negative)
No dogs are fishes.
Patton is not a general who always fails.
I ( Particular Affirmative)
Some dogs are small.
O (Particular Negative)
Some dogs are not small.
Affirmative or negative
Quality
Quantity
All S are P
Particular
Some S are P
Standard form of Categorical statement:
Quantifier + Subject + Copula + Predicate
No Americans are poor.
All Americans are previllaged man.
.
Some Republicans are cowards.
Identify the subject
Ask what the statement is about.
Copula for “do not”
Are not
Quantifier for Joh F Kennedy
Or no
Contrary: All S are P.
No S is P
Contradictory: All S are P
Some S are not P
Contradictory:
Some S are P
No S is P
Subalternate: All S are P
Some S are P
Subalternate: No S is P
Some S are not P.
Subcontrary : All S are P
No S is P
Subcontraries: Some S are P
Some S are not P
Universal statements lack existential import:
their truth does not depends on the existence of S .
Particular statements have existential import
Their truth does depends on the existence of S
Conversion ( diagram must be the same.)
Some Englishmen are heavy drinkers
Some heavy drinkers are Englishmen.
The converse of of the A proposition is illegitimate. You can say : all pickpockets are criminals., but you can not say all criminals are pickpockets.
The the converse of an a proposition is called
The fallacy of illicit conversion.
The conversion of the. Proposing is also inconsistent. Some human beings are Americans.
Some Americans are not human beings.
Obverse of A : All sandpaper is an abrasive thing.
E: No sandpaper is a non abrasive thing.