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Generate the answer for a given question. The question requires common knowledge of English. Make sure that the answer is in detail, long, consistent with the context, and requires general knowledge of English. To be less repetitive, please vary your language for each question. Give a proper explanation to answer, and if necessary, provide the definition of various terms. And conclude your answer if it's long. If you have used other resources (e.g., Merriam Webster's.) to answer the question, include citations in your answer. You don't need to paraphrase the context of your resources, but make sure that your answer is consistent and complete.

There is a person in my current daily life who never admits his wrongs. He is always quick to blame others first and always believes that he is not wrong. Even when he is proven wrong, he still believes he shouldn't be sorry and isn't wrong. Is there a single-word adjective to describe this behavior? If not, a better way to describe this person would also make do. While stubborn and irresponsible fit, I feel like they don't tell the whole story. By this, I mean if I were to say to others that he is very stubborn and irresponsible, it is not implicitly implied that he blames others and never acknowledges his own fault. Edit: I believe my question is different because the person will also never acknowledge their wrongdoing. On top of blaming others, even after it has been proven to be their fault, they will not admit wrong doing. So aside from blaming others, they refuse to acknowledge the possibility that they have committed a mistake.
Output:
Sounds like a remorseless/unrepentant person. ODO: remorseless ADJECTIVE 1 Without regret or guilt. 'We're given to understand that because Charlie is tormented by guilt that he somehow occupies a higher rung on the moral ladder than his unrepentant, remorseless elder brother.' unrepentant ADJECTIVE Showing no regret for one's wrongdoings. 'he was unrepentant and said that his comments were completely accurate'