ExpressionPossible rhetorical force
زَيْدٌ الْأَمِيرُFactual restriction or identification of the known emir
عَمْرُو الشُّجَاعُHyperbolic excellence in courage
هُوَ الْوَاهِبُ أَلْفَ قِنْطَارٍRestriction to giving a particular amount
الْحَسَنُ الْجَمِيلُA contextually known or merely descriptive quality
A speaker may use a restrictive construction to present someone as exceptionally distinguished in a feature; this need not establish the nonexistence of all other real examples. It is important to distinguish rhetorical hyperbole from factual exclusivity.