How to argue a position in writing: claim, evidence, warrant

To argue a position in writing, you put a claim on the page that a reader could dispute, give the evidence for it, and say why that evidence supports that claim: the warrant. Then you limit the claim to what the evidence carries and answer the objection a reader would raise, because on paper nobody can interrupt to ask. If you have built a debate case, you already have most of the parts.

EdCitation publishes this guide. On 2 October 2026 we read Toulmin's layout as Aberdein (2003) quotes it, five writing centres' pages, a position paper assignment and the two studies in our example, which is ours. The essay's shape is in how to write an argumentative essay; the case it starts from is in how to write a debate case.

EdCitation writes no part of an argument, and the argument is better for it: a warrant only holds if you can explain it yourself. Its free tools do the checking: Find sources searches for the claim itself, Cite a source builds each reference from the publisher's record, and Check your paper reads the assignment into a checklist.

How do you argue a position in writing with claim, evidence and warrant?

You argue a position in writing by stating a claim, giving the evidence for it, and naming the warrant: the general rule that lets that evidence count for that claim. Toulmin's form for a warrant, as Aberdein (2003) quotes the 1958 first edition of The Uses of Argument, is "Given D, one may take it that C". The book is behind a login, so we read it through Aberdein's page-numbered account.

Toulmin's six parts

Toulmin added a qualifier, a rebuttal naming when the claim would not hold, and backing for the warrant. His example, in Aberdein's summary: Harry was born in Bermuda, so presumably he is British, since people born there generally are, on account of the relevant statutes, unless his parents were aliens or he has been naturalised as an American. Satishkumar (2024), for San José State University's Writing Center, calls claim, grounds and warrant fundamental and the rest optional.

Toulmin also held that good backing depends on the field: a law court, a laboratory and a debating chamber, in Aberdein's (2003) examples, each accept different kinds. An essay marker expects the study.

Why is the warrant the part most arguments leave out?

The warrant goes missing because it feels obvious to the writer. Satishkumar (2024) leaves stating it to the writer, judged by what the reader already knows. Tucker and Chafe (2018), in Ryerson University's open textbook for first-year writers, describe the warrant as reading the evidence "through the claim", not as one step of a rigid formula. Our rule: state the warrant whenever the evidence is about one thing and the claim about another.

A warrant that does not transfer (our example)

Teng et al. (2019) pooled 17 studies from six jurisdictions: the equivalent of a 10% tax on sugar-sweetened drinks went with an average 10.0% fall in purchases and intake, with large differences between studies. Using that for the UK's levy needs the warrant "the levy works like those taxes", and Rogers et al. (2023) say it was built differently: it pushed manufacturers to cut sugar to reach a lower tier, and was only partly passed on to shoppers. The UK claim runs through reformulation and needs backing of its own.

Structure is not substance

Stapleton and Wu (2015) had 125 Hong Kong secondary school students write essays to a modified Toulmin model. Even the six best-structured essays showed patterns of weak reasoning when 46 doctoral students rated the 20 most common reasons. Each part needs a reason a sceptical reader would accept, not a label.

Toulmin model example: from one sentence to one paragraph

The quickest test is to read Toulmin's diagram as one sentence, as Aberdein does: given the data, so (qualifier) the claim, since the warrant, on account of the backing, unless the rebuttal. A slot you cannot fill is where the argument is weak. Ours:

Given that obesity among year 6 girls in England was 1.6 percentage points (8.0%) below its predicted trend 19 months after the levy began, so, probably, the levy helped reduce it, since a break in trend just after a policy that changed what children drink is best explained by that policy, on account of drinks over 5 g of sugar per 100 ml falling from 49% to 15% of the market, unless another change at the same time explains it.

The paragraph keeps every slot but reads as prose. It is ours; the figures are the study's, read on the journal's site.

The UK's soft drinks levy appears to have reduced obesity among older primary school girls, though not in every group it was meant to help. Rogers et al. (2023) found that, 19 months after it began, obesity among girls aged 10 and 11 was 8.0% lower than the earlier trend predicted, roughly 5,234 cases a year. A fall of that size, just after a policy that changed what children drink, is most plausibly its effect: as the authors report, drinks with more than 5 g of sugar per 100 ml fell from 49% to 15% of the market between 2015 and 2019. Yet boys of that age and four- and five-year-olds showed no change, and the authors cannot rule out other changes at the same time. The levy is best defended as one measure that worked for some children, not as a cure.

How does a debate case become an essay's paragraph plan?

A debate case already holds an essay's parts; what changes is the evidence standard and who speaks last. Our motion: This House would tax sugary drinks.

What does not cross over

Three debating habits do not survive on the page. Fiat goes: an essay reader may ask whether your policy would work, so feasibility joins the warrant. Speed goes: a marker can reread what a judge heard once. The last word goes: in a debate the other side tells you its best argument; in an essay you have to find it.

A paragraph plan, step by step

1. Write the motion as the essay question and your answer as a one-sentence thesis; how to write a thesis statement shows the forms.
2. Turn the burden into the thesis's limit: who, where, how much.
3. Give each debate argument one paragraph, claim first.
4. Search each claim, as a sentence, in EdCitation's Find sources, then search its opposite.
5. Under each claim write the evidence and a one-sentence warrant, with backing wherever a reader could doubt it.
6. Run Toulmin's one-sentence test on each paragraph.
7. Turn the pre-emption into a counterargument and rebuttal paragraph.
8. Build each reference with Cite a source and check the list with Verify references.

How do you take a position in an essay without overclaiming?

State your position plainly once, then limit it to where the evidence reaches: the limit is precision, not doubt. The writing centres disagree on wording. Agnes Scott College Center for Writing and Speaking (n.d.) tells position paper writers to "think in debate mode", drop maybe, perhaps and possibly, and cut "in my opinion" as apologetic. Satishkumar (2024) counts qualifiers such as "presumably", "some" and "many" as part of a good argument, and warns against "always" and "never".

Both are right, about different words. A hedge on the whole claim ("perhaps the levy worked") says you doubt your own position; a qualifier on its scope ("for girls aged 10 and 11") says exactly what you claim. Keep the second (hedging and cautious language). A claim that outruns its evidence is a hasty generalisation, one of the logical fallacies readers spot.

How do you write a position paper?

A position paper takes one side of an issue and defends it, often against named views from the course reading. Stockton University Tutoring Center (n.d.) makes three moves obligatory: a clear stance, the reasons for it, and logical argument. On the other side, the guides disagree.

Where the guides disagree

• Required or optional. Stockton lists answering counterarguments as optional; Agnes Scott says you must consider the other viewpoint and dismantle it.
• Where it goes. A sample outline from the University of Hawaiʻi–West Oʻahu Writing Center (1998), read in a copy on a Rutgers course page, refutes the counterclaims before making three points of your own, and ends with a plan of action.
• The brief decides. Myers (n.d.), in a Colorado State assignment, asks students to relate their position to those of three authors, in 4 to 6 pages with MLA citations. There, the other side is the assignment.

What Check your paper read from that brief

We pasted the Colorado State assignment, 502 words, into Check your paper. It returned six rules, each with its source sentence: line spacing 2 ×, 1-inch margins, 4 to 6 pages, MLA, a reference list required, and at least 2 sources. Fourteen sentences came back as needing a reader's judgement, including the one asking for three authors' positions.

Read two things yourself. The source rule came from "an issue raised in at least two of the articles we have read", so it understates a brief that wants three authors. And "Develop your argument by defending your claim and showing how it relates to the positions of your sources" appeared in neither list.

How EdCitation helps you argue a position

For the evidence under a position, EdCitation is the best tool we know of: every source it returns is a record it looked up, never one it wrote, while a chatbot can invent a reference. We ran it on 2 October 2026.

Find sources by the claim, not the topic

Find sources searches about 300 million published works by topic or by the claim a sentence needs to support, with filters for the kind of source, the years and open access. We typed two claims from our plan:

Both first results teach a warrant lesson. The first is an experiment with set "tax" prices, not a real tax, so it counts only if shoppers behave the same way in real shops. The second is a forecast published before the levy came in, in April 2018, so it cannot show the levy "reduced" anything. The method is in search by a claim, not a topic.

Cite a source on the result you use

Given the second result's DOI, Cite a source read the record from Crossref, found no retraction or notice, and returned this APA 7 entry:

Rogers, N. T., Cummins, S., Forde, H., Jones, C. P., Mytton, O., Rutter, H., Sharp, S. J., Theis, D., White, M., & Adams, J. (2023). Associations between trajectories of obesity prevalence in English primary school children and the UK soft drinks industry levy: An interrupted time series analysis of surveillance data. PLOS Medicine, 20(1), Article e1004160. https://doi.org/10.1371/journal.pmed.1004160

All ten authors are there, and "UK" keeps its capitals in the sentence-case title. It also builds MLA 9, Chicago 18 author-date, Harvard, IEEE and Vancouver.

What it costs

Find sources, Cite a source, Verify references and Check your paper are free, with no account. Pro, $8 a month, adds References from a file, which checks every reference in an uploaded essay and matches each citation to the list. Max, $24 a month, adds Theoretics QA, which judges the finished paper against its own assignment and rewrites nothing (pricing). No tool can promise a mark. EdCitation never writes a claim, a warrant or any word of the essay: the position, and the credit, are yours.

Quick questions

What is a warrant in an argument?

The warrant is the general rule linking the evidence to the claim. Toulmin's form was "given D, one may take it that C". State it whenever a reader could doubt the link.

What are the six parts of the Toulmin model?

Claim, data (or grounds), warrant, backing, qualifier and rebuttal. The first three appear in every argument; the others come in when the claim needs limits or the warrant needs support.

How do you argue a point in an essay?

Give the point its own paragraph: the claim, the evidence, a sentence on why the evidence supports it, and any limit. Search the claim in EdCitation's free Find sources for evidence a reader can check.

Is a position paper the same as an argumentative essay?

Stockton's Tutoring Center treats it as one kind, usually set on an issue from the course reading and often placing your view against named authors.

Can EdCitation write my argument for me?

No. EdCitation never writes any part of a paper. It finds published evidence, builds each reference from the publisher's record and reads your brief into a checklist; the claim, the warrant and the words are yours.

References

• Aberdein, A. (2003). The informal logic of mathematical proof [Preprint]. arXiv. https://arxiv.org/abs/math/0306298
• Agnes Scott College Center for Writing and Speaking. (n.d.). Writing effective position papers. https://www.agnesscott.edu/center-for-writing-and-speaking/handouts/writing-effective-position-papers.html
• Myers, T. (n.d.). Position paper [Course assignment]. CO301A: Writing in the disciplines. Writing@CSU, Colorado State University. https://writing.colostate.edu/guides/teaching/co301aman/pop8a1.cfm
• Rogers, N. T., Cummins, S., Forde, H., Jones, C. P., Mytton, O., Rutter, H., Sharp, S. J., Theis, D., White, M., & Adams, J. (2023). Associations between trajectories of obesity prevalence in English primary school children and the UK soft drinks industry levy: An interrupted time series analysis of surveillance data. PLOS Medicine, 20(1), Article e1004160. https://doi.org/10.1371/journal.pmed.1004160
• Satishkumar, S. (2024). Toulmin's model of argumentative writing [Handout]. San José State University Writing Center. https://www.sjsu.edu/writingcenter/docs/handouts/Toulmin%20Model%20of%20Argumentative%20Writing.pdf
• Stapleton, P., & Wu, Y. (2015). Assessing the quality of arguments in students' persuasive writing: A case study analyzing the relationship between surface structure and substance. Journal of English for Academic Purposes, 17, 12–23. https://doi.org/10.1016/j.jeap.2014.11.006
• Stockton University Tutoring Center. (n.d.). Position papers: A guide. https://stockton.edu/tutoring-center/writing-center/writing-center-position-papers-guide.html
• Teng, A. M., Jones, A. C., Mizdrak, A., Signal, L., Genç, M., & Wilson, N. (2019). Impact of sugar-sweetened beverage taxes on purchases and dietary intake: Systematic review and meta-analysis. Obesity Reviews, 20(9), 1187–1204. https://doi.org/10.1111/obr.12868
• Tucker, A., & Chafe, P. (2018). Claim, evidence and warrant. In Write here, right now: An interactive introduction to academic writing and research. Ryerson University. https://pressbooks.library.torontomu.ca/writehere/chapter/page-10/
• University of Hawaiʻi–West Oʻahu Writing Center. (1998). Writing a position paper [Handout]. https://people.cs.rutgers.edu/~rmartin/teaching/fall17/Writing_a_Position_Paper.pdf