 This picture is oversimplified. All non-science is not pseudoscience, and science has non-trivial borders to other non-scientific phenomena, such as metaphysics, religion, and various types of non-scientific systematized knowledge. (Mahner (2007, 548) proposed the term “parascience” to cover non-scientific practices that are not pseudoscientific.) Science also has the internal demarcation problem of distinguishing between good and bad science.