Falsificationists
Falsificationists are proponents of the philosophical principle of falsificationism, most famously associated with the philosopher of science Karl Popper. This principle posits that for a theory to be considered scientific, it must be capable of being proven false. In other words, there must be some conceivable observation or experiment that could demonstrate the theory to be incorrect.
Falsificationism stands in contrast to verificationism, which sought to confirm theories through evidence. Popper argued that
Therefore, falsificationists believe that the progress of science occurs through a process of conjecture and refutation.
Key to falsificationism is the idea of demarcation. A theory is deemed scientific if it makes specific,