What is an example of ambiguity in Mending Wall?

One example of ambiguity in Robert Frost's "Mending Wall" is the speaker's questioning of the necessity of the wall. While one character firmly believes in maintaining boundaries and keeping the wall in place, the other character wonders if there is a valid reason for the wall's existence beyond tradition. This ambiguity raises questions about the significance of barriers in human relationships and the balance between connection and separation.