Portal:Philosophy of science/Selected article/9
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Pseudoscience is any body of knowledge, methodology, belief, or practice that claims to be scientific but does not follow the scientific method. Pseudosciences may appear scientific, but they do not adhere to the scientific method's falsifiability requirement. There is no bright line between science and pseudo-science, and at times many of the most successful theories have been called unscientific. For example, Copernican physicists had no data to support their theories for centuries, while the Aristotleans had all empiricism on their side.
After over a century of dialogue among philosophers of science and scientists in varied fields, and despite broad agreement on the basics of scientific method, the boundaries between science and non-science continue to be debated. This is known as the demarcation problem.
