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.

Bill will attend the party, but only if Ted does also.

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Inverted Pairs

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.

Inverted Pair

A and B cannot be on the same team together.

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