Aristotle on what must necessarily be...
Much of our last episode dealt with what Aristotle meant by words like ‘every’ and ‘some.’ As we discussed at some length in our previous post, in the Aristotelian setting, the meaning of ‘every’ was slightly different from what we’re used to. Under today’s meaning of the word ‘every,’ when I say ‘every frog is green,’ you can check to see whether what I just said is true by checking to see whether the set of frogs is a subset of the set of green things....