The term "problem plays" refers to a particular genre of plays that address social and moral issues, but without a clear resolution or moral stance. These plays often lead the audience to question their values and beliefs, hence the term "problem". Synonyms for "problem plays" include "social dramas", "issue plays", or simply "dramas". Other related terms could be "ethical dramas", "thought-provoking plays" or "intellectual plays", as they all address complex moral and philosophical questions. Some famous examples of problem plays are Henrik Ibsen's "A Doll's House" and Arthur Miller's "Death of a Salesman".