In The Frogs Xanthias and Dionysus make several comments about other playwrights. Why do you think they do this?

Xanthias and Dionysus comment on other playwrights to criticize their works and point out flaws in their writing. This helps highlight the differences between the comedic style of Aristophanes and the more serious, formulaic works of his contemporaries, ultimately emphasizing the unique and innovative nature of Aristophanes' own playwriting.