Explain Julia's method dispatch ambiguity and how it is resolved.

Dispatch ambiguity occurs when multiple methods match equally well, and Julia cannot determine a single most specific method.

Julia resolves dispatch by selecting the most specific method signature. However, if two methods overlap without a clear hierarchy, ambiguity arises. Julia either throws a warning or error depending on the situation. Developers must design method signatures carefully using abstract type hierarchies or more specific dispatch rules to avoid conflicts.