Toulmin Method

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Why does a writer believe the claim s/he makes? The reasons a writer gives are the first line of development of any argument. To use our "house of cards" image again, reasons comprise the second level of an argument, without which the uppermost level (the claim) cannot remain balanced (or, in the language of argument, "effective").

How can we tell if reasons are strong? In other words, how can we determine whether or not they are sturdy enough to support the claim? Using the Toulmin method, we ask two main questions: Is the reason relevant to the claim it supports? and Is the reason effective?

• Determining the Relevance of the Reasons
• Determining the Effectiveness of the Reasons