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Flashcards in Venn diagrams Deck (11)
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1

We shade...

where we know nothing exists

2

We place an x...

where we know something exists

3

Universal assertion

All S are P

4

Particular assertion

Some S are P

5

Universal denial

No S are P

6

Particular denial

Some S are not P

7

Categorical proposition

proposition that either asserts or denies that all or some members of a category are included in another.

8

Contraries

Do not exhaust logical space. Universal assertions are contrary to universal denials. They cannot both be true, but they can both be false. e.g. all bread it nutritious, no bread is nutritious

9

Contradictories

Do exhaust logical space. Universal assertions are contradictory to particular denials. e.g. all bread is nutritious, some bread is not nutritious

10

the universal premise should always be diagrammed...

first

11

if the x can go in two regions, put it...

on the line in between