No the writer does not have to include the underlined portion of the thesis statement in the work.
The conclusion of a paper's introduction frequently includes a thesis statement. It provides a succinct overview of the essay's, research paper's, etc. key thesis or claim. It is typically stated in a single sentence, however it might be repeated elsewhere.
A thesis statement should make clear the subject of your paper and will aid in keeping it on a manageable subject.
The answer is no, as a thesis can be a decent preview without providing details of an argument or supporting evidence.
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