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 ...

UNSW Sydney provides funding as a member of The Conversation AU. When the Australian federal environment minister, Sussan Ley, went snorkelling on the Great Barrier Reef in August, she told waiting ...

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 ...

In the last posting, I pointed out that the free will problem is usually framed as the question of whether freedom is possible in a deterministic universe. One reply to this question (as we’ll see, it ...