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In the intestine , they help to move fecal material along in cooperation with a process called peristalsis ( the movement of food material by the squeezing of the intestinal muscles ) . First of all , let me explain the basics of electrolysis . As for the second assumption of science , it is simply that the universe is governed by discoverable laws that are themselves both a part of and the source of objective reality . Thanks for your question , this is a subject which interests a lot of people , along with the philosophical question of whether we ought to believe in things just because it is impossible to disprove them . Although this is easy to summarize on a screen , I can assure you that it is the result of considerable work over the past three years .