It's bad to plagiarize other people's work.
Kara is reading through articles for her research paper for her history class and finds an obscure website with thoroughly-written articles.
Kara wants to finish writing her research paper.
Kara uses the website in her research paper and properly cites it as a material source.
Kara copies some paragraphs from the website to her final research paper and submits it.
The professor praises Kara's paper and gives her an A for the class.
The professor runs Kara's paper through a program and finds that she copied it from the website without citing it, and fails Kara for academic dishonesty.