Flashcards in Venn diagrams Deck (11)
where we know nothing exists
We place an x...
where we know something exists
All S are P
Some S are P
No S are P
Some S are not P
proposition that either asserts or denies that all or some members of a category are included in another.
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
Do exhaust logical space. Universal assertions are contradictory to particular denials. e.g. all bread is nutritious, some bread is not nutritious
the universal premise should always be diagrammed...