It was the critic Frederick who first used the term problem plays for some of Shakespeare's plays in 1896, though the term was not his coinage and was already in use before for writers like Ibsen and Shaw. The three plays that are usually categorised as problem plays are All's Well That Ends Well, Measure for Measure and Troilus and Cressida. He remarked that this play was distinguished from the others by its tragic ending, but it was akin to them in its general temper and atmosphere..It is believed that these plays presented problems, which demanded attention and broke the conventions of genre.