1. Relationships of Equivalences February 10 - 12

2. Observe Relationship How two things relate to each other Mathematical A=A or ~A=~A Logically A=A, E=E, I=I, O=O and same with negation Example: All Trees are plants i nstead No trees are nonplants

3. The Converse Relationship The converse of a standard-form categorical statement is formed simply by interchanging its subject and predicate terms Mathematically if A=B then B=A Logically only works for E and I Example: Some trees are plants SO Some plants are trees

4. ContraPosition Occurs when a positive is replaced by negation and the predicate and subject are flipped. ~A=~A or ~I=~I Example: All Cat are mammals therefore All nonmammals are noncats