What is AI? In some sense it is engineering inspired by biology. We look at animals, we look at humans and we want to be able to build machines that do what they do. We want machines to be able to learn in the way that they learn, to speak, to reason and eventually to have consciousness. AI is engineering but, at this stage, is it also science? Is it, for example, modeling in cognitive science? We would like to think that is both engineering and science but the contributions that is has made to cognitive science so far are perhaps weaker than the contributions that biology has given to the engineering.