Its so common to fall into that trap of ,"i am with you or against you",but most religious teachings advocate that;" Either you are for us or against us".
Even in times of war the soldier are made to believe that they belong to one side. With such scenario, can one argue that their could be a collective victory for both sides, It could be possible when there is a truce , the limiting factor is that each side want to be victorious.

But coming to political discuss, the politicians understood this aspect very well that majority of the time the citizen accuse them of speaking from both side of the tongue.
but like you said, there is no absolute certainty as no one has the monopoly of truth.
You can bring more light to this discuss, I will like to hear your perspective if you happen to go through this comment.
Regards
To community of positive minded Steemians and @chbartist