For the moment, I am presenting this as a question. It is a question for which I believe I have the answer. But I will postpone discussing that until future posts.
I am currently watching (for the second time), a TED talk by David Deutsch:
In that video, Deutsch is puzzling about what changed at the time of the scientific revolution. He correctly points out that people have been making observations and coming up with explanations for thousands of years. We often describe their explanations as myths. Something must have changed in what we are doing, that made science possible.
I strongly recommend watching that Deutsch video, though I disagree with its conclusions.
Deutsch’s idea is that the ancients were looking for the wrong kind of explanation, and that modern science has been looking for the right kind of explanation. For Deutsch, a bad explanation is one that can be easily varied to accomodate new evidence. A good explanation should be difficult to vary. However, according to the Quine-Duhem thesis, this problem applies in some manner to all scientific theories.
Is disagree with Deutsch on the role of explanations. In my opinion, we should treat all scientific explanations as myths. A scientific explanation is, in some sense, the advertising blurb used in the marketing of a scientific theory. The explanation is needed, as a way of drawing people’s attention to the science. But the explanation often oversimplifies and distorts the actual science.
Over the last few days, I have been rereading Laudan’s book:
In that book, Laudan has four fictional philosophers of science discussing their disagreements about their work. The four are a positivist, a realist, a pragmatist and a relativist.
I presume that Laudan’s main aim is to contrast the relativist’s view with that of the others. However, what comes across to me, is that the other philosophers also have significant disagreements with one another. As I read through the discussions, I find that I sometimes agree with one of the participants and sometimes with another. I perhaps agree least with the positivist, though I do share the positivists view that we should eschew metaphysics. I think I agree most with the pragmatist. But there are points where I agree with the realist and points where I agree with the relativist.
Their committee discussions center around some of the same issues that Deutsch discusses in his view:
- What does it mean to say that science is progressing?
- What is the significance of the apparent theory-ladenness of data and of the underdeterminination of theories by the data?
- How do we measure scientific success?
- Is there an incommensurability between theories (as Kuhn argued)?
Overall, I disagree with every one of the four. As I see it, they have failed to understand how science works, and their disagreements with one another derive from that failure to understand science.
I still have a post or two coming up on truth and correspondence. After that, I shall attempt to post something on how science works. In the meantime, I suggest watching that TED video.