Purdue university writing thesis statement

First, the word pollution implies that something is bad or negative in some way.


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Furthermore, all studies agree that pollution is a problem; they simply disagree on the impact it will have or the scope of the problem. No one could reasonably argue that pollution is unambiguously good. This is an example of a debatable thesis because reasonable people could disagree with it. Some people might think that this is how we should spend the nation's money.

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Others might feel that we should be spending more money on education. Still others could argue that corporations, not the government, should be paying to limit pollution. In this example there is also room for disagreement between rational individuals. Some citizens might think focusing on recycling programs rather than private automobiles is the most effective strategy. Although the scope of your paper might seem overwhelming at the start, generally the narrower the thesis the more effective your argument will be.

Your thesis or claim must be supported by evidence. The broader your claim is, the more evidence you will need to convince readers that your position is right. There are several reasons this statement is too broad to argue.

Composing a draft

First, what is included in the category "drugs"? Is the author talking about illegal drug use, recreational drug use which might include alcohol and cigarettes , or all uses of medication in general? Second, in what ways are drugs detrimental? Is drug use causing deaths and is the author equating deaths from overdoses and deaths from drug related violence?

Is drug use changing the moral climate or causing the economy to decline? Finally, what does the author mean by "society"?

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Is the author referring only to America or to the global population? Does the author make any distinction between the effects on children and adults? There are just too many questions that the claim leaves open. The author could not cover all of the topics listed above, yet the generality of the claim leaves all of these possibilities open to debate.

In this example the topic of drugs has been narrowed down to illegal drugs and the detriment has been narrowed down to gang violence. This is a much more manageable topic.

Purdue OWL - Introductions, Body Paragraphs, and Conclusions for an Expository/Persuasive Essay

This thesis narrows the scope of the argument by specifying not just the amount of money used but also how the money could actually help to control pollution. This thesis narrows the scope of the argument by specifying not just what the focus of a national anti-pollution campaign should be but also why this is the appropriate focus.


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  • Thesis Statements This handout describes what a thesis statement is, how thesis statements work in your writing, and how you can discover or refine one for your draft. Characteristics of a Strong Thesis 1.

    A strong thesis statement will make a claim. Rather, you need to develop an interesting perspective that you can support and defend. This perspective must be more than an observation. It should inspire other points of view from your reader.

    Developing a Thesis // Purdue Writing Lab

    This sentence determines what you are required to say in a paper. It also determines what you cannot say. Every paragraph in your paper exists in order to support your thesis. If it seems like your paper is supporting something other than your thesis, you need to change your thesis or edit your paper. A strong thesis statement will provide structure for your paper.