Sane In A Tell-Tale Heart'

From the beginning of the story the narrator was trying to convince the reader that he is not crazy. He would use questions like “would a madman do this?” to prove that he was sane.
Throughout the story “A Tell Tale Heart”, there is a character who is trying to convince the reader that he is sane. While he is trying to convince the reader he makes it a point to say “would an insane person do this?” to things a normal person would not do or would not say that. Later on, he tries so hard to play off that nothing happened in the house that it lead to his downfall and him confessing himself to the police officers in killing the old man. That was ironic because his downfall was him going mad and hearing a murdered man’s heart beat which he tried