4. Pairs (must be together)
Under this logical condition, A and B are inseparable.
Prof. Bazett of the University of Cincinnati introduces you to biconditionals in the following video (bi-conditionals combine two conditionals):
This video is purpose-built for the GMAT and expands into combining biconditionals and contrapositives.
What if you invert the original “if and only if” conditional: A → B + B → A?
Instead you use: ~A → B + ~B → A
This results in an opposite condition because now the A and B can never be together.
A and B cannot be on the same team together.