Pseudoscience is a catch-all term for scientific theories and practices that have no evidence to back them up, but its supporters still present them as if they’re legitimate and proven. They can include:
* Unverified medical treatments (bleach ‘cleanses’ to cure autism)
* Theories and practices that rely heavily on subjective observation or the placebo effect (homeopathy)
* Theories that are biased to support a particular ideological conclusion (phrenology)
* Theories and practices that were once assumed as correct, but disproven as research and technology improved (Lamarck’s theory of evolution)
* Theories and practices claiming something that can’t be measured or observed (ESP)
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