Chapter 5: Formal and Informal Logic
Chapter 5: Formal and Informal Logic
Chapter 5: Formal and Informal Logic
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Grammatical versus <strong>Logic</strong>al Form<br />
The grammatical form of a proposition (or of an argument)<br />
• is the structure of the proposition (or argument) as indicated by<br />
the surface grammar of its natural language<br />
The logical form of a proposition (or of an argument)<br />
• is the logically effective structure of the proposition (or argument)<br />
as indicated by the meanings of the logical terms it contains<br />
ARGUMENT: Critical Thinking, <strong>Logic</strong> <strong>and</strong> the Fallacies <strong>Chapter</strong> 5: <strong>Formal</strong> <strong>and</strong> <strong>Informal</strong> <strong>Logic</strong> 5–4
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