Chapter 5 - Categorical Logic

Question 1

Corresponding statements

Answer 1

Categorical statements having the same subject term and predicate term

Question 2

Contradictories

Answer 2

Two statements that cannot both be true and cannot both be false

Question 3

Contraries

Answer 3

Two statements that cannot both be true but they can both be false

Question 4

Necessary truth

Answer 4

A true statement that cannot be false under any circumstances

Question 5

Subcontraries

Answer 5

Two statements that cannot both be false but can both be true

Question 6

Necessary falsehood

Answer 6

A false statement that cannot be true

Question 7

Subalternation

Answer 7

The logical relationship between a universal statement and its corresponding particular statement

Question 8

Converse

Answer 8

A statement formed by interchanging the subject and predicate terms

Question 9

Conversion by limitation

Answer 9

The inference in which we switch the subject and predicate terms of an A statement and change the quantity from universal to particular

Question 10

Complement

Answer 10

The class containing all things that are not a member of the original class

Question 11

Term-complement

Answer 11

The word or phrase that denotes the class complement

Question 12

Obverse

Answer 12

A statement formed by changing its quality and replacing the predicate term with its term compliment

Question 13

Contrapositive

Answer 13

A statement formed by replacing the subject term with the term compliment of its predicate term, and replacing the predicate term with the term compliment of its subject term.

Question 14

Immediate inference

Answer 14

When a conclusion is drawn from only one premise