To summarize, the boundaries between science and pseudoscience are often blurred.
Some practices straddle the divide, like complimentary medicine, and others can begin as a pseudoscience and develop into a science.
For example, the pyramid scam selling e-books claiming that water used in your car engine saves gas is physically impossible.
Scientists often finds other explanations than those of the pseudoscience.
Working the other way, phrenology, where many proponents believed that a person’s personality could be assessed by measuring the shape of the skull, is now debunked. Whilst some ‘pure’ scientists refer to many of the social sciences and market research as not proper science, they do at least attempt to follow the scientific method. Check the credentials of any researchers, as it is easy to be swayed by qualifications, and pseudo scientists are very good at switching fields.
For example, a professor of quantum physics typically knows less about biology than first year biology undergraduate, so why are they qualified to comment upon evolution?
Pseudoscience often uses the media as a first stop, rather than submitting their work for peer review.
No genuine researcher would dream of publishing their results until they had passed all of the rigors of the scientific method.
Acupuncture, Cognitive Behavior Therapy and Reflexology are good examples.
Physicians and consultants often refer patients, believing that there may be some benefit if these therapies are used alongside regular medicine.