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Validit, validity, satisfiability, and unsatisfiability, are properties of individual sentences. In logical reasoning, we are not so much concerned with individual sentences, as we are with the...
Some people ask the question of what good is math?  What is the relationship between math and physics?  Well, sometimes math leads.  Sometimes physics leads.  Sometimes they come together because, of...
In this video on categorical arguments and reasoning I'm going to show you how to diagram categorical claims. And in particular, I'm going to show you how to diagram the A-claim. I'll do some upcoming...

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JAMES GRIME: 0. That's our friend. Yes. To a mathematician this is a number. But it wasn't always obvious. ROGER BOWLEY: Math existed to do financial transactions, to sell sheep, to buy copper things,...

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DAVID HODGE: So what are we going to be talking about today is whether or not numbers exist. We're going to be thinking about three different schools of thought on this. First one's Platonism, second...