According to Karl Popper, a discipline that claims to be a science is really a pseudoscience like astrology if it:

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According to Karl Popper, the defining characteristic of a science is that its claims are falsifiable. In other words, a scientific discipline should be able to make predictions that can be tested and potentially proven false. If a discipline cannot make such refutable predictions, such as astrology, it is considered a pseudoscience rather than a true science.

According to Karl Popper, a Discipline That Claims to Be