JoeDawg said:
Newton's understanding of gravity was purely observational. He described a pattern. He had no interest in what makes it work.
No that it is certainly not accurate. He was not fully satisfied with the philosophy of his own work, he was quite a metaphysical type, but he could only accept the success of his own work.
JoeDawg said:
once a scientist moves beyond simply recording data, into inductive reasoning, explanation, and justification; the philosophy of science does become important.
Yes, once a scientist moves beyond doing science. And they all do.
There is one point that I would also like to emphasize. Weinberg is not even discussing cosmology. He really refers to very high energy physics. What is philosophical in coming with string theory, LQG, non-commutative geometry, or twistor methods ? All those have technical motivations and developments. Scientists understand them technically better than philosophers, and only once scientists will tell philosophers "ok now this is this one theory you should seriously study" may we expect serious efforts to come up with something interesting to say from philosophers. By this time, scientists will study something else already. It is certainly not to say that there are not very distinct philosophical prejudices behind the different approaches quoted above.
It is amusing that you quote Einstein for instance. We may evaluate the value
for researchers of a few short perfectly clear books Einstein has written versus several order of magnitudes more philosophers have written about relativity.
By the same token, I may read 50 pages from Alain Connes and understand quantum mechanics even better than by reading von Neumann and certainly better that by reading thousands of books about the philosophy of quantum mechanics. Those are not useless
absolutely, they are useless for working scientists today.