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‌You're wrong!

This is copied word for word, but there is no reference. This makes the reader think that the words and ideas belong to the student when they don't. Therefore it is definitely plagiarism.

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 You're wrong!

This is definitely plagiarism. It is better than extract 1, because there are reference details for the original source. However, the text is copied word for word, so it should be in quotation marks (" " or ' ') to show that it is the same as the original text.