arguable. It does contain at least two clauses, usually an independent clause (the opinion) and a dependent clause (the reasons). Couldn't that be "the best thing"?). Do not begin to state evidence or use examples in your thesis paragraph. They are not specific enough, however, and require more work.
Writing Tips: Thesis Statements - Center for Writing Studies
This thesis is perfect for setting up a tidy five-paragraph essay. Provides a "hook" on which you can "hang" your topic sentences. Refine, as you work on your essay, your ideas will change and so will your thesis. Avoid making universal or pro/con judgments that oversimplify complex issues. Your thesis statement should tell your reader what the paper is about and also help guide your writing and keep your argument focused. Your thesis statement should be as clear and specific as possible. Teachers will have different preferences for the precise location of the thesis, but a good rule of thumb is in the introduction paragraph, within the last two or three sentences. Your thesis can be a few sentences long, but should not be longer than a paragraph. Steps in Constructing a Thesis, first, analyze your primary sources. Is your thesis statement original? Avoid overused, general terms and abstractions. A thesis can be found in many placesa debate speech, a lawyers closing argument, even an advertisement.