So (our defense continues): Turgenev has made a panel of judges with different personalities and degrees of susceptibility and authority, which allows him to provide a precise picture of the two performances as they unfold in real time, via a precise hierarchy of response. That is why these side characters must be described: so that when they react, we’ll know what those reactions mean, which to credit and which to discount; through them, he creates a sort of ascending ladder of credibility.