Final answer:
The play concludes with doubt about whether the Capulets and Montagues have truly learned from the tragedy, as their reconciliation seems forced and lacks evidence of a genuine change in attitudes or behavior.
Step-by-step explanation:
The evidence that the Capulets and Montagues have not learned their lesson is the continued hostility and inability to prevent the tragic deaths of their children, Romeo and Juliet. Despite the tragic deaths of Romeo and Juliet, there is no direct indication within the conclusion of Shakespeare's play that the families have truly understood the ramifications of their feud. While the families declare peace in the face of their shared tragedy, the text does not provide confirmation that they have fully grasped the role their animosity played in driving their young lovers to their dire fate.
The rapid reconciliation seems superficial, somewhat forced by the extreme circumstances rather than a genuine transformation of character or understanding of the consequences of their longstanding rivalry. Without a display of reflective learning or a change in the underlying attitudes of the families, the audience is left to question whether peace will be lasting or if the cycle of violence and animosity could eventually resume. This lingering doubt serves to underline one of the main themes of the play: the devastating repercussions of senseless conflict.