Correct me if I'm wrong, but I seem to remember learning that pH=14 does not necessarilly mean that the solvent that is causing that pH is saturated. In the case of strong alkalis, pH=14 may occur far below saturation, but cannot increase as more alkali is added. An acid-base reaction may occur in a strong solution of KOH and go to completion, leaving the pH at 14, with capacity remaining for more such reactions.
What happens to pH when we add just enough KOH to an amount of paraminophenol to form the potassium paraminophenolate? It seems to me that pH>7 implies that more than enough KOH was added, but even pH=14 does not tell us how much more.
You are quite right. It also tells us though that an alkaline solution has so many moles / liter of hydroxide ion present.