The following is part of an interview from cbc radio. The interviewee is Sajay Samuel .
Isn’t scientific knowledge true since it manifestly works? Samuel begins his answer by drawing a distinction he finds in the work of historian of science Peter Dear.Samuel Sajay: Peter Dear notes that, when we today speak about science, we speak about science in two ways. We refer to bodies of knowledge that tell us something about the world as it is. We also speak about science as an instrument with which to change the world, to improve the world—the vaccine, the bomb, the car.It has both this instrumental face, to use his language, and a natural, philosophical face—natural philosophy being the study of the way the world works and the way the world is. When you ask, why is science true? Why is a certain theory true?, the tendency is to say, because it works, because the plane flies, because the vaccine prevents disease, because the atom bomb explodes—those stand as proofs of the truth claims of science. If science were false, if the truth claims made by science were false, this vaccine wouldn’t work. If you ask, why does this vaccine work; it’s because the science is true. There’s circularity in this jusࢢficaࢢon; it’s true because it works, and it works because it’s true. Peter Dear calls it an ideology, and he calls it that in part, I think, because it can be falsified. Take the case of radio waves, which is one of his two examples. The predicࢢon of radio waves in 1880, I think it was, by Hertz, based upon a scienࢢfic theory propounded by Maxwell regarding the ether. The atmosphere is composed of ether through which radio waves propagate. Well the radio waves, which is one of his two examples. Well the radio waves were real—the prediction was sound; it worked—but the theory was not: it was utterly false. The other example he gives is of navigators, who, even today, use the old geocentric astronomy rather than the heliocentric astronomy. Again, you can have a perfectly false theory regarding what the world is, and it’s useful. You can get things done. This unquestioned justification—why is something true? Because it works. Why does it work? Because it’s true— can be easily falsified. And yet is held. We don’t tend to question the connection between knowing something and constructivism, knowledge through construction can be understood to be the signature of modernity.What concerns Samuel is that science, historically speaking, doesn’t just supplement common sense; it displaces it. Scientific knowing becomes the epitome of reason and the paradigm of all proper knowledge. The term “common sense” continues to denote sound judgment, but it also begins to evoke a certain ignorance of how things really are. Typical, in this respect, is Albert Einstein’s often cited remark that “common sense is nothing more than a deposit of prejudice laid down by the mind in childhood.”Samuel wants to contest science’s monopoly of reason. He would like to restore the dignity of common sense and restrict the application of science. Two distinctions are crucial to his case: mathematical knowledge must be distinguished from judgment, and experiment must be distinguished from experience.
