All people are mortal. Socrates is a person. Therefore: Socrates is mortal. This is the classic example of the West’s preferred form of reasoning— deductive logic. We have long professed to prefer it ...
We have seen that we can deduce new conditionals from old. But where do we get conditionals to start with? Fortunately, we can get conditionals from our three principles. Premise (5) in the LSAT ...