Slide 1 of 8
Introduction
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Some arguments aim to establish a conclusion that must be true if their starting statements are true. This kind of reasoning is called deduction.
Deduction is useful when applying definitions, following exact rules, or checking whether statements fit together. Its strength comes from the connection between the premises and the conclusion.
That strength has a condition: the premises still need to be true if we want a true answer about the world. A flawless connection cannot repair a false starting statement.