The article discusses how metaphysics and natural science interact in modern philosophy. Empiricists believe in a strict separation between science and metaphysics, while Popper's demarcation criterion allows some room for metaphysics but is not fully accepted. To understand this interaction better, we need to define metaphysics and its content. The Thomist theory of Double Truth is a good example of how science and metaphysics can work together. It's important to approach this topic from both a historical and logical perspective.