Consider these relations. Each one has a bidirectional relation that always goes with it. Responding to a relation in one direction (the IF column) entails responding to the relation in the other direction (the THEN column).
IF | THEN |
---|---|
A is smaller than B | B is bigger than A |
A comes before B | B comes after A |
A is the cause of B | B is the effect of A |
A is behind B | B is in front of A |
A is the same as B | B is the same as A |
A is in B | B contains A |
A is better than B | B is worse than A |