Karl Popper and Falsification
Karl Popper's Nontraditional Views on Science: Is Falsification Correct?
Falsification, also called refutability, is the logical possibility that an assertion, hypothesis, or theory can be contradicted by an observation made or by the outcome of a physical experiment. Made popular by philosopher of science, Karl Popper, falsification provided a method in which scientists start with a current scientific theory and use the usual methods of deductive reasoning to derive specific conclusions, some of which are "predictions" (Kenyon 1). This prediction could then become falsifiable if some observation or experiment had the ability to produce a result that would consistently reproduce a result in conflict with that earlier prediction. For example, the notion that "all birds can fly" is falsifiable, as empirical evidence has been found to disprove this notion. In essence, such a scientific standpoint appears not only valid but logical at first glance. However, in viewing the rocky history of falsification and its use, along with debates within the scientific community as to its validity in all situations, it appears that within the realm of natural science, more traditional views prove favorable in most cases.
Falsification in Use
All scientists, and many laymen, understand that science is essentially a process. While much of what we hold as truth has been so for hundreds of years, with each passing day, the capacity for those "truths" to be expanded upon or altogether refuted not only exists, but is highly probable. Take for example the "truth" of the phrase "Pluto is a planet." For years, such a statement was not only true in the minds of scientists, but in the minds of humanity as a whole. However, today, upon continued research and questioning of such truths, this sentence no longer holds up. Today, Pluto is no longer associated as being a planet, but is considered a "dwarf planet," which is possibly the most notable example of disproven science in recent years.
This notion of disproving existing science or standards is essentially what falsification draws from. Its goal is not solely to disprove, but to expand and correct on assumptions that may be more complex than we would stand to believe at first glance. In Popper's view, every scientific theory is "prohibitive," in the sense that it forbids, by implication, particular events or occurrences from happening (Thornton 1). Thus, Popper believed that scientific theories, no matter how highly these theories measured in terms of corroboration or acceptance, should not be held as truth, but "provisionally retained" as the best available theory until "eventually falsified and/or superseded by a better theory" (Thornton 1).
In understanding this basis for questioning and continually learning about scientific aspects of the natural world, one can understand how the notion of falsification is used in terms of questioning "known" theories or assumptions. For example, like the aforementioned example, the assertion "all swans are white" is falsifiable because it has been empirically verified that there are indeed swans in existence that are not white. However, not all statements that are falsifiable in principle are falsifiable in practice (Popper 82). For example, a statement such as: "it will be raining here in one million years" is theoretically falsifiable if one applies past events and analysis, but is not practically falsifiable because there is absolutely no way to truly know if that assertion is true or false.
Debates
As stated previously, not all statements that are falsifiable in principle are falsifiable in practice, which allows both critics and supporters of Popper's methods to have a field day in debating the validity of falsification in the realm of science and scientific theory. The idea that no scientific discovery or theory can truly be held as truth because of its existence in the past or the future, which keeps us from ever truly knowing the full extent of the goings-on at a certain point in time, allows for a slippery slope of acceptance or disbelief of any scientific standard or assumption....
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