"There's every excuse for what both your mother and I did - it turned out unfortunately, that's all,''
> The noun "excuse" connotes a pathetic, worthless reason, suggesting Mr Birling is
desperate to excuse himself of blame.
> The words "unfortunately" and "that's all" convey his heartlessness, suggesting
the upper classes trivialised and dismissed the lower classes' hardships.
> Eva's death is merely an unforeseen tragedy, an inconvenience, and not worthy
enough to make Mr Birling accept responsibility.