As defined by who? Everything turns on who does the defining. You have not addressed the point that methodological naturalism is a relatively new paradigm. No such restrictions were placed on all the great scientists of the past. They believed that science was knowledge gained through a disciplined and systematic investigation of data. What is your justification for abandoning this broad view of science?
The basic premise of methodological naturalism, that the particular sciences are to remain theologically neutral, is not exactly a new paradigm. For instance, Galileo understood well the distinction between astronomy and theology. The traditional liberal arts education of the medieval universities distinguished various branches of studies. These were known as the trivium and quadrivium, the seven liberal arts.
The current division of the particular sciences came about as each science made advances in its own field of study. Still, even in ancient times, such as classical Greece, there was an understanding of the different branches of knowledge. Euclid’s geometry is geometry and does not involve biology or metaphysics. Aristotle recommended that subjects be studied in a certain order: logic, the sciences, mathematics, and last of all, first philosophy or metaphysics.
The word science can be used in a broad sense. In the broad sense of the term any organized body of knowledge that is based upon certain primary principles constitutes a science. Accordingly, theology is a science. It is literally the science of God. Chemistry is a science. The object of chemistry is inorganic bodies.
Each science has its “material object” and its “formal object”. The material object is simply the thing or subject matter with which it is concerned. The material object of theology is
God. The
material object of chemistry is
inorganic bodies. The
formal object of a science is that which it studies immediately and of its very nature. The
formal object of chemistry is the intrinsic or substantial changes of inorganic bodies.
Each science has its own scope and province. Philosophy is the science that studies things in their ultimate or first causes. The natural sciences study nature in its secondary or proximate causes. Philosophy is not concerned with providing explanations of sensible phenomena in their proximate causes. Philosophy investigates the first causes of things *in the natural order. *The natural sciences, biology, chemistry, etc., investigate the secondary causes of sensible phenomena.
I.D. confuses natural science and philosophy, while operating from an erroneous understanding of causes from a philosophical perspective.
Intelligent Design confuses primary and secondary causes. Hence, I.D. cannot be considered a natural science. I.D. does not have a formal object of such a nature that it can be designated a natural science.
You assert that the broad view of science is being abandoned. This is false. Science in the broad sense is being misused by I.D. in its attempt to dissolve the distinctions between the various particular sciences, philosophy, and revealed theology.
It makes no sense to assert that methodological naturalism limits the scientist. A scientist is free to provide a philosophy of nature just as he is free to investigate nature in its secondary causes. However, the two activities should not be confused or conflated.
It becomes problematic when scientist overstep the limitations of the particular sciences and attempts to provide a scientific explanation for what is strictly philosophical. For example, an evolutionist who denies the existence of final causes in nature by arguing from scientific data, is actually presenting a pseudo-scientific theory that encroaches on the domain of philosophy.
So, there are these kind of problems among Darwinists, but evolution in general remains a legitimate natural science. I.D. cannot make the same claim.