Obtaining the right thesis statement for your thesis gives the necessary impetus to your thesis writing efforts. It is such an important statement since it forms part of the proposal you will be seeking to be approved so as to give you the go-ahead to start writing the paper. No professor will approve your proposal if the thesis statement seems vague in any way. It has to be water-tight enough to avoid invoking contradictions about the topic. Ambiguity is a disease that kills any sample thesis statement faster than it takes to type it.