A statement written in "if and only if" form.
It is sunny if and only if we are in Arizona.
A true bi-conditional statement means the conditional statement AND the converse are both TRUE!
x = 3 if and only if x2 = 9
1. Conditional Statement: If x = 3 then x2 = 9.
This is true!
2. Converse: If x2 = 9, then x = 3
This is FALSE! x = 3 AND -3