Pride and Power
"He certainly didn't make me confess!" reveals Mrs Birling's attempt to assert power and defiance. She implies that she spoke only because she chose to, not because the Inspector compelled her, underlining her pride and belief that she is above moral interrogation.
This statement shows her failure to grasp the moral weight of the situation, while younger characters like Sheila and Eric have accepted their guilt. Priestley uses this contrast to highlight the generational divide in attitudes toward responsibility.
Through Mrs Birling, Priestley shows how some people cling to power and control even when confronted with their moral failures. Her stubbornness represents the resistance of the upper class to social change, reinforcing the play's themes of generational conflict.
Dramatic technique: Notice how Mrs Birling's defiance creates tension in the play, especially when contrasted with the Inspector's calm but relentless questioning.