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How does a logical argument use premises to support a conclusion?
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In logic, an argument is a structured process of reasoning where one or more propositions, known as premises, are used to support a conclusion. This transition from premises to a conclusion is called an inference.1
The way premises support a conclusion depends on the type of reasoning:
- Deductive Reasoning: In a valid deductive argument, the premises are intended to provide a logical guarantee for the conclusion. If the premises are true, the conclusion must necessarily be true due to the argument's form or structure. When an argument fails to provide this necessary support, it is considered a fallacy.213
- Inductive Reasoning: These arguments provide support that makes the conclusion probable rather than certain. While they do not offer logical necessity, they are often accepted as strong on other grounds.21
Arguments that fail to provide rational grounds for accepting a conclusion are categorized as fallacies. Understanding these structures is essential, as the validity of an inference relies on its logical form rather than the actual truth of the content within the premises.241