In a valid argument, it is not possible that the conclusion is false when the premises are true. Or, in other words: In a valid argument, whenever the premises are true, the conclusion also has to be true. (more...)

A fallacy in Critical Thinking is an error in argumentation that makes an argument invalid. (more...)

What if the Second World War had turned out differnetly? This article explains why counterfactuals and alternative histories can be misleading. (more...)

Can two people’s experiences and outlooks on life be so different that meaningful communication between them is impossible? Recent events suggest so. Despite this, philosopher Donald Davidson gives us good reasons why this distance need not inhibit constructive discussion and provides us with the tools to argue well. (more...)