Bouwsma questions Descartes' support and thought process of an evil demon deceiving us and comes to the conclusion that Descartes' explanation is confusing, so Bouwsma creates a situation to prove his point. The first scenario is that of an illusion and deception, but which can ultimately be seen as an illusion. He uses the example of flowers in a vase which later turns out to be made of paper, making him discover that everything is made of paper, from afar this was an illusion. The fictional character used may have experienced the illusion, but eventually realized that it is an illusion. An eventual illusion is something we constantly experience, but Bouwsma used it to demonstrate that we have a conceptual understanding of what things are and can often differentiate what is an illusion; I don't entirely believe this is the case in our current world, due to conformity and attempts at validation, but that's just my thoughts