Final answer:
Dr. Manette's role in condemning Darney to death is defined by irony, showcasing the complexities of literary irony.
Explanation:
Irony is the defining factor in Dr. Manette's role in condemning Darney to death.
This situation exemplifies dramatic irony, where the audience understands the ironic meaning behind the character's actions while the character remains unaware.
Dr. Manette's unintentional contribution to Darney's fate showcases the complexities and consequences of irony in literature.
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