The essence of pseudoscience

Nowadays the notion of pseudoscience is very wide and even got the additional meanings. But all meanings are based on the essence of the pseudoscience.
Pseudoscience may be used to name the non-qualified, incompetent activity from the point of view of science.
Another meaning is the incompetence and ambitious of the people who are not scientists but their assistants. Sometimes it is even the conscious lie on base of the science. Very often it appears on base of the connection of science and religion, mythology and science, science and arts.
Pseudoscience is also the term to call each other used by the opponents that don't support the ideas of the certain science or in the limits of one science.
The main criteria of pseudoscience can be easily found in the articles written by such people. Such articles usually don't have quotations of the scientists, the author uses only the terms that exist in the limits of one theory. The theory pretends to change the whole world and the views of people on the world.
But if the theory really admits its verifying on base of the practical knowledge then such science can't be called pseudoscience being even the most extraordinary and unbelievable. Some of such sciences can be the base for the development of new spheres of knowledge and specifying the certain science.
It is necessary to remember that you shouldn't refer the aspects of life to pseudoscience that don't refer to science from the beginning. I mean religion, sports, theatre, etc.