30 The Toulmin Argument Model
Kirsten DeVries and Christina Frasier
Learning Objectives
- Examine a contemporary approach to argumentation.
- Identify the component elements of a thorough, well-reasoned argument.
Stephen Edelston Toulmin (born March 25, 1922) was a British philosopher, author, and educator. Toulmin devoted his works to analyzing moral reasoning. He sought to develop practical ways to evaluate ethical arguments effectively. The Toulmin Model of Argumentation, a diagram containing six interrelated components, was considered Toulmin’s most influential work, particularly in the fields of rhetoric, communication, and computer science. His components continue to provide useful means for analyzing arguments, and the terms involved can be added to those defined in earlier sections of this chapter.
The following are the parts of a Toulmin argument:
- Claim: The claim is a statement that you are asking the other person to accept as true (i.e., a conclusion) and forms the nexus of the Toulmin argument because all the other parts relate back to the claim. The claim can include information and ideas you are asking readers to accept as true or actions you want them to accept and enact. One example of a claim:\My grandfather should wear a hearing aid.
This claim both asks the reader to believe an idea and suggests an action to enact. However, like all claims, it can be challenged. Thus, a Toulmin argument does not end with a claim but also includes grounds and warrant to give support and reasoning to the claim.
- Grounds: The grounds form the basis of real persuasion and includes the reasoning behind the claim, data, and proof of expertise. Think of grounds as a combination of premises and support. The truth of the claim rests upon the grounds, so those grounds should be tested for strength, credibility, relevance, and reliability. The following are examples of grounds:
Over 70% of all people over 65 years have a hearing difficulty.
Hearing aids raise hearing quality.
Information is usually a powerful element of persuasion, although it does affect people differently. Those who are dogmatic, logical, or rational will more likely be persuaded by factual data. Those who argue emotionally and who are highly invested in their own position will challenge it or otherwise try to ignore it. Thus, grounds can also include appeals to emotion, provided they aren’t misused. The best arguments, however, use a variety of support and rhetorical appeals.
- Warrant: A warrant links data and other grounds to a claim, legitimizing the claim by showing the grounds to be relevant. The warrant may be carefully explained and explicit or unspoken and implicit. The warrant answers the question, “Why does that data mean your claim is true?” For example,
A hearing aid helps most people hear better.
The warrant may be simple, and it may also be a longer argument with additional sub-elements including those described below. Warrants may be based on logos, ethos or pathos, o