What is scientific skepticism?

Scientific skeptics believe that empirical investigation of reality leads to the truth and that the scientific method is best suited to this purpose. They attempt to evaluate claims based on verifiability and falsifiability and discourage accepting claims on faith or anecdotal evidence. Scientific skeptics often focus their criticism on claims they consider to be implausible, dubious or clearly contradictory to generally accepted science.

Scientific skeptics do not assert that unusual claims should be automatically rejected out of hand on a priori grounds—rather they argue that claims of paranormal or anomalous phenomena should be critically examined and that extraordinary claims require extraordinary evidence before they can be accepted. From a scientific point of view, theories are judged on many criteria, such as falsifiability, Occam’s Razor, and explanatory power, as well as the degree to which their predictions match experimental results. Skepticism is part of the scientific method; for instance, an experimental result is not regarded as established until it can be shown to be repeatable independently.

For further information, see this article about scientific skepticism.