1The professor of metaphysics at the university was known for his complex theories about the nature of time and space.
2Is metaphysics a science, or is it purely a matter of philosophical speculation?
3Her interest in metaphysics led her to study the works of ancient Greek philosophers such as Plato and Aristotle.
4The concept of free will is a central issue in the study of metaphysics, with some philosophers arguing that it is an illusion.
5The relationship between metaphysics and science is a topic of ongoing debate among scholars, with some arguing that they are complementary disciplines.