What is the best definition of metaphysics according to the author?

The best definition of metaphysics aligns with the study of ultimate reality, which is foundational to philosophical inquiry. Metaphysics explores fundamental questions such as the nature of existence, the relationship between mind and matter, and the nature of space and time. It delves into what lies beyond the physical realm, seeking to understand the underlying principles and concepts that govern reality. This perspective is essential for various philosophical discussions, particularly in chiropractic philosophy, as it helps practitioners understand the broader implications of healing and the human experience.

The other options provide related concepts but do not encapsulate the essence of metaphysics as accurately. The application of ethical beliefs pertains more to moral philosophy rather than the fundamental nature of reality. A method of scientific inquiry focuses on empirical investigation and observable phenomena, which is distinct from the philosophical quest that metaphysics undertakes. Analyzing physical phenomena relates to areas of physics and the sciences, while metaphysics seeks to understand the principles that may govern those phenomena, thus reinforcing why the definition emphasizing ultimate reality is the most appropriate.