For one thing, whatever we know, we cannot know what it would be like in the absence of our knowing it, and different people find different things in the world. Even the same person finds different things on different occasions, when the context or the type of attention changes. That does not mean, of course, that everything that exists owes its nature and existence solely to us. But it does mean that, whether we are scientists or not, we can only know the world as we have inevitably shaped it by the nature of our attention.
