The document discusses plagiarism, defining it as copying verbatim the language and ideas of other writers and passing them off as one's own. There are two types of plagiarism: plagiarism of ideas, which involves falsely taking credit for another's work, and plagiarism of language, which involves using another's words without proper citation. The document provides several methods for avoiding plagiarism, such as author-oriented citation, text-oriented citation, and using direct quotations, paraphrasing, or summarizing with proper attribution.