ABSTRACT

A good argument should contain true premises, but it should also cite premises that are related in the right way to the conclusion. The first type of good argument consists of ones that are "deductively valid". In the preceding pair of arguments, fixing the defect of invalidity just substitutes one problem for another; instead of having to criticize an argument for being invalid, the people now have to criticize an argument for having a premise that isn't true. When the goal is rational persuasion, a good argument will provide a good reason to think that the conclusion is true. Good arguments are tools that help answer questions about whether their conclusions are true. A good argument should give the people a reason to accept the conclusion if they don't already believe the conclusion is true. Most of the things the authors believe aren’t made true by their believing them.