Toulmin Model PPT - Chandler Unified School District

Toulmin Model PPT - Chandler Unified School District

The Toulmin Model A Tool for Diagramming Informal Arguments Stephen Toulmin Stephen Toulmin, originally a British logician, is now a professor at USC. He became frustrated with the inability of formal logic to explain everyday arguments, which

prompted him to develop his own model of practical reasoning. The three basic elements: Claim (assertion or proposition) Grounds (proof, grounds, support) Warrant (inferential leap) Claims A claim is the point an arguer is trying to make. The claim is the conclusion, proposition, or assertion

an arguer wants another to accept. The claim answers the question, "So what is your point? example: Rosario is an American citizen, because she was born in the United States. example: Because the groundhog saw his shadow, there will be six more weeks of winter. More about claims... There are four basic types of claims: fact: claims which focus on empirically verifiable phenomena

judgment/value: claims involving opinions, attitudes, and subjective evaluations of things policy: claims advocating courses of action that should be undertaken definition/classification: indicates what criteria are being used to define a term or what category something falls into Grounds (proof or data) Grounds refers to the proof or evidence an arguer offers. Grounds can consist of statistics, quotations, reports, findings,

physical evidence, or various forms of reasoning example: Im a vegetarian. One reason is that I feel sorry for the animals. Another reason is for my own health. example: I made the dinner, so you More about grounds... Grounds are the support the arguer offers on behalf of his/her claim. The grounds answer questions such as: "What is your proof? "How do you know?

"Why? example: It looks like rain. The barometer is falling. example: "The other Ritz Carlton hotels I've stayed at had great pools, so I'll bet this one has a great pool too." Still more about grounds... grounds can be based on: evidence: facts, statistics, reports,

or physical proof source credibility: authorities, experts, celebrity endorsers, a close friend, or someone's say-so analysis and reasoning: reasons may be offered as proof premises already held by the listener Clue words for identifying grounds The grounds for an argument often follow words such as because, since, given

that example: Airports should x-ray all luggage because a bomb could be placed in a checked baggage. example: I expect to do well on the test, since I studied all night for it. Warrants The warrant is the inferential leap that connects the claim with the grounds. The warrant is typically implicit (unstated) and requires the listener

to recognize the connection between the claim and grounds. Some arguments are multiwarranted, e.g., based on more than one inferential leap. More about warrants... The warrant performs a "linking" function by establishing a mental connection between the grounds and the claim example: Muffin is running a temperature. Ill bet she has an infection. (warrant: sign reasoning; a fever is a reliable sign of an infection) example: "That dog is probably friendly. It is a

Golden Retriever. (warrant: generalization; most or all Golden Retrievers are friendly) Still more about warrants... warrants can be based on: ethos: source credibility, authority logos: reason-giving, induction, deduction pathos: emotional or motivational appeals value premises: values shared by, or presumed to be shared by, the receiver(s) note: these categories aren't mutually

exclusive, there is considerable overlap among the three Limitations regarding the Toulmin model Offers a somewhat static view of an argument. Focuses on the argument maker, not the target or respondent. Real-life arguments arent always neat or clear. Is an analytical tool Useful for dissecting arguments before or after theyve been made

Not as useful, practical in the heat of an argument Since warrants are unstated, different listeners may perceive them differently. The first triad -sample argument 1 The Angels are likely to win the ballgame tonight. They are playing at home. Grounds

Claim Warrant (unstated) Generalization: The home team enjoys an advantage in baseball. The first triad -sample argument 2 It was nominated for 4 Academy Awards.

Juno is a wonderful movie. Grounds Claim Warrant (unstated) Sign: a movies greatness can be measured in the number of Oscar nominations it receives. The first triad -sample argument 3

Biff was probably in a fight. He has a black eye Claim Grounds Warrant (unstated) Sign: A black eye is a reliable indicator that a person has been in a fight.

The first triad -sample argument 4 If you surf at Huntington Beach right after it rains you risk getting a bacterial infection. Runoff from the rain washes bacteria into the ocean. Claim

Grounds Warrant (unstated) Cause-effect: bacteria in the water causes surfers to get ill. For additional information about Toulmin, link to the Prezi below: toulmin-arguments/

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