Won't all group translations always have two correct translations and two incorrect translations?

For example:

Correct: If not physical exercise, then health deteriorates.

Correct Contra: If not health deteriorates, then physical exercise.

Wrong: If physical exercise, then not health deteriorates

Wrong Contra: If health deteriorates, then not physical exercise.

There will always be four possible translations, two correct, two incorrect. I think sometimes it helps to know all four possibilities to clearly understand why the correct ones are in fact correct.