Science and philosophy – 1

A couple of days back, in a comment on this video, I wrote

Unfortunately because of the philosophy of logical positivism, most scientists today are afraid or unwilling to accept the necessity of metaphysics at all.

Today, I started reading a book “dreams of a final theory” by Steven Weinberg. Early on in the book, he writes

Speaking of a final theory, a thousand questions and clarifications crowd into the mind. What do we mean by one scientific principle ‘explaining’ another? How do we know that there is a common starting point for all such explanations? Will we ever discover that point? How close are we now? What will the final theory be like? What will it say about life and consciousness? And, when we have our final theory, what will happen to science and to the human spirit?

A few pages later, explaining what the pursuit of a final theory means, he starts with “Chalk is white. Why?” Some answers (light, wavelengths etc.) and then another “why”. Some more answers (atomic structure, energy levels etc.) and then another “why” and so on until he comes to a point where he does not know the answers. Finally, he writes,

Even so, it is a tricky business to say exactly what one is doing when one answers such a question. Fortunately, it is not really necessary.

and then, a few paragraphs later,

Ludwig Wittgenstein, denying even the possibility of explaining any fact on the basis of any other fact, warned that ‘at the basis of the whole modern view of the world lies the illusion that the so-called laws of nature are the explanations of natural phenomena.’ Such warnings leave me cold. To tell a physicist that the laws of nature are not explanations of natural phenomena is like telling a tiger stalking prey that all flesh is grass. The fact that we scientists do not know how to state in a way that philosophers would approve what it is that we are doing in searching for scientific explanations does not mean that we are not doing something worthwhile. We could use help from professional philosophers in understanding what it is that we are doing, but with or without their help we shall keep at it.

As an engineer, I can certainly sympathize with what Weinberg is saying. Philosophers such as Wittgenstein have betrayed science (and philosophy). But that is not a good enough reason for scientists to abandon philosophy. Proper science needs a solid base in philosophy. I dare say that without an explicit (philosophical) understanding of what “searching for scienific explanations” means, scientists will not discover a final theory. I think science has reached a level (based on some reading of quantum mechanics) from where it cannot proceed without answering some fundamental questions that are not just scientific.

Anyhow this is a fascinating subject, and I will return to it often. I have been fascinated by this subject for about an year now, and have been reading some books off and on when I find time. So far I have not written on this subject, because I do not like to write unless I have a clear idea of what I am writing. But it seems unlikely that I will find answers to questions like this without a lot of thinking. So I intend to think by putting my thoughts on this blog instead of doing it before going to sleep.

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