Ah, nothing like a little logical paradox for Christmas. Today we will look at how to make a valid argument—that disagrees with itself and makes no sense. Dive in to the paradox of entailment. When ...

Yuri Arcurs peopleimages.com / Getty Images/iStockphoto When I was in college, I remember naively signing up for a course called “Introduction to Logic.” It turned out to be one of the greatest ...

For regulars at Ars Technica, the forums are as much a part of the site’s identity as the articles. And where there are forums, there are flame wars. The BattleFront is infamous for its contentious ...

To persuade you, people often try to use logical fallacies (Credit: Javier Hirschfeld) When people are trying to persuade you, they sometimes reach for underhand tricks like the 'appeal to ignorance' ...

Solutions are available by request for course instructors and the self-taught. These documents are intended for the spring 2024 version of PHI 201, Introductory Logic. However, they will be fine-tuned ...

Add Yahoo as a preferred source to see more of our stories on Google. This week's post is the first in a series that will provide you with a complete overview of LSAT content and the basic skills you ...

Some people are really good at logical reasoning. They quickly recognize that a particular argument is well-structured and that one point follows clearly from the next. Other people seem more strongly ...

Patent prosecution involves one side arguing for, and another side arguing against, the validity of claims in a patent application. This takes the form of a written discourse, in which an Examiner for ...

Originally published on Sept. 25, 2018. In a world of divisive politics, rhetoric and debate, author Eugenia Cheng has the secret to winning an argument: mathematical logic. Cheng, a mathematician and ...

Arguments are attempts to persuade by providing reasons (or premises or propositions) in support of a particular claim (or conclusion). In a deductive or ‘truth-preserving’ argument, the conclusion ...