I'd like to thank Wiley-Blackwell publishing group and David Papineau for the material I'm about to present.
Before we start talking about falsifiability as it is used in science, we should talk about the problem of induction.
The problem of induction is best explained by example. When a scientist boils water and sees that water comes to a boil at 212º F, the scientist will probably conclude that he has discovered a law of nature, namely that all samples of water will always come to a boil at 212º F. But here's the problem noted by David Hume; at what point do we get to say that a certain amount of tests gurantees that there is a law? Or, more akin to Hume, how do we know that the "law" will not change in the future? This problem is rooted in the fact that we are trying to take a particular set of data and applying it to all things, or taking a particular and extrapolating that to a universal. This does not follow, of course.
So, that being said, without some solution to the problem of induction, we really are not rationally justified to believe that the future will be the same as the past.
This is where falsifiability comes in. Karl Popper invented falsifiability as a means to overcome the problem of induction. Basically, science doesn't prove certain theories true, rather, Science is about DISproving theories, and we act as though theories which have not been falsified are "true". While widely believed within the natural sciences, falsifiability as a scientific tool is very controversial among Philosophers of Science.
The foremost objection by Philosophers of Science is that Popper's falsificationism does nothing to solve the problem of induction, but rather, it redefines science and concedes the problem of induction. Popper's falsificationism only accounts for negative scientific knowledge. One counter-example can disprove a scientific theory. But it doesn't account for positive scientific knowledge, and this is what makes science important. In other words, Science is important because it informs us of true scientific theories. Opines Papineau "we can cure diseases and send people to the moon because we know that certain causes do always have certain results, not because we know that they do not."
Let's argue by example, once again. If I jump out of a 10-story window, I have two options
(1) I will land on the ground and die, or be in much pain
(2) I will float away harmlessly
(1) assumes that the laws of nature will remain the same, but (2) does not. On popper's view, neither theory is more rational than the other. But something has gone HORRIBLY wrong here, OF COURSE we are more rational to believe (1) than (2)! Falsifiability cannot account for this, and therefore, as good scientists and philosophers, we must discard falsifiability
Log in to comment