Although you have creative control over your thesis sentence, you still should try to avoid the following problems, not for stylistic reasons, but because they indicate a problem in the thinking that underlies the thesis sentence.
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The sentence above actually is a thesis sentence; it has a topic (hospice workers) and an angle (need support). But the angle is very broad. When the angle in a thesis sentence is too broad, the writer may not have carefully thought through the specific support for the rest of the writing. A thesis angle that’s too broad makes it easy to fall into the trap of offering information that deviates from that angle.
The above sentence really isn’t a thesis sentence at all, because there’s no angle idea to support. A narrow statistic, or a narrow statement of fact, doesn’t offer the writer’s own ideas or analysis about a topic. A clearer example of a thesis statement with an angle of development would be the following:
A legal comparison might help to understand thesis placement. If you have seen television shows or movies with courtroom scenes, the lawyer usually starts out by saying, “My client is innocent!” to set the scene, and then provides different types of evidence to support that argument. Academic writing in the U.S. is similar; your thesis sentence provides your main assertion to set the scene of the writing, and then the details and evidence in the rest of the writing support the assertion in the thesis sentence.
As a writer, you have the option of placing the thesis anywhere in the writing. But, as a writer, you also have the obligation to make the thesis sentence idea clear to your readers. Beginning writers usually stick with “thesis sentence toward the start,” as it makes the thesis prominent in the writing and also reminds them that they need to stick with providing evidence directly related to that thesis sentence’s angle.