Chap 9 Categorical Logic Flashcards Preview

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Flashcards in Chap 9 Categorical Logic Deck (8)
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Q

Boolean interpretation

A

the interpretation of categorical sentences that was developed by George Boole and that dispensed with the assumption of existential import for universal sentences.

1
Q

Aristotelian assumption

A

The assumption underlying the Aristotelian square of opposition, that the categorical statements under consideration all have existential import.

2
Q

Empty class

A

A class in which no entities of that category exist.

3
Q

Existential import

A

A categorical statement is said to have “existential import” if its subject term refers to a class that is not empty; that is, the subject term refers to actual existing entities.

4
Q

Existential Viewpoint

A

( or standpoint) The viewpoint presupposing that the subject terms of the sentences under consideration designates actually existing things.

5
Q

Hypothetical Viewpoint

A

the viewpoint that does not presuppose that the subject terms of the sentences under consideration designate actually existing things.

6
Q

Modern Square of opposition

A

the square of opposition that results when the aristotelian assumption is dropped. the arrows for contradiction are all the remain.

7
Q

Venn diagram

A

A drawing of overlapping circles designed to represent the information contained within one or more categorical statements.