Mr Birling, Act One: despite Me Birling's arrogance and certainty, the titanic does sink even though he claims it to be "unsinkable". This use of dramatic irony signifies how the Birling family, a seemingly powerful and wealthy family, will fall and the Titanic acting as a metaphor of his own family and his claims about the Titanic are similar to his beliefs about his family and how they are superior, believing they are untouchable until the Inspector arrives giving them the news of Eva Smith's suicide and their involvement in her death. Not only this, but the sibilance between the adjectives "unsinkable" and the repetition of this adjective could portray how Mr Birling will be undermined and defeated due to the Inspector's superior views on "socialism", showing how people who are capitalist are wrong and are bigots, like mr Birling