Final answer:
Using someone else's words without proper citation, even if the sentence structure is changed, is considered plagiarism. Citation is necessary to acknowledge the source of the ideas.
Step-by-step explanation:
The statement that using someone else's words in your paper is not plagiarism as long as you thoroughly change the sentence structure is false. Properly paraphrasing does involve changing the sentence structure and using your own words, but it is also necessary to provide a formatted citation for the original source, making clear where the ideas or concepts originate from. This applies even if you write the ideas in your own voice. Without this attribution, the act can be considered plagiarism, as it presents someone else's ideas as your own. A balanced approach in academic writing includes a combination of correctly cited paraphrasing and your own original ideas to ensure that your voice remains prominent and the writing does not rely too heavily on the sources.