In this video, Paul Henne (Duke University) discusses the philosophical concept of validity. After reviewing the structure of an argument, he defines validity: an argument is valid if and only if its premises guarantee the conclusion. He reviews a few examples of validity and invalidity, and he leaves you with one example to figure out on your own.

Assistant Professor of Philosophy at Lake Forest College

I am an Assistant Professor of Philosophy at Lake Forest College. I research causal and moral reasoning, the judgments associated with these reasoning processes, and the moral and political decisions that result from them. I am also the Associate Director of Wireless Philosophy.

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