  The philosophy of science is a discipline concerning the metaphysical aspect
of science. Recently, I proposed measurement theory, which is characterized as
the metaphysical and linguistic interpretation of quantum mechanics. I assert
that this theory is one of the most fundamental languages in science, and thus,
it is located at the central position in science. This assertion will be
examined throughout this preprint, which is written as the draft of my future
book (concerning the philosophy of science). Hence, I hope to hear various
opinions about this draft.
