* As soon as Mrs Birling finds out that Eva was pregnant, she shifts all blame to the father of the child. -
* As this man is described, dramatic irony (when the audience knows something the characters don’t) unfolds as the audience realise that this man is actually Eric, Mrs Birling’s son.
* As Mrs Birling continues her speech, the audience waits for her to work out that she is actively criticising her own son.
* As long as this man is anonymous (not named), she does not care what happens to him.
* When she starts to realise it could be her son, she stutters and stops talking.