The lines from Edgar Allan Poe's short story "The Black Cat" that reveal an unreliable narrator are:
An unreliable narrator is a person who describes the events in a story but for some reason, their account cannot be trusted. The narrator in this text can be deemed unreliable because he entertained evil thoughts.
A person who entertains evil thoughts should not be trusted because he can switch the narratives of a story to suit his perspective.
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