Square of Opposition

When

A is

E is

I is

O is

A is true

*

False

True

False

A is false

*

Either

Either

True

E is true

False

*

False

True

E is false

Either

*

True

Either

I is true

Either

False

*

Either

I is false

False

True

*

Either

O is true

False

Either

Either

*

O is false

True

False

True

*