Sometimes you will not be able to identify these elements in your early drafts, but as you consider how your argument is developing and how your evidence supports your main idea, ask yourself, "What is the main point that I want to prove/discuss?" and "How will I convince the reader that this is true?" When you can answer these questions, then you can begin to refine the thesis statement.
Compare the original thesis (not specific and clear enough) with the revised version (much more specific and clear): Original thesis: Although the timber wolf is a timid and gentle animal, it is being systematically exterminated. (if it's so timid and gentle, why is it being exterminated?) Revised thesis: Although the timber wolf is actually a timid and gentle animal, it is being systematically exterminated because people wrongfully believe it to be a fierce and cold_blooded killer.
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