That's "conception", and certainly I can agree with you that materialism is part of the metaphysical basis of science, and not a scientific conclusion. But it is in fact ingrained in the foundation and practice of science, and abandoning it would be tantamount to an overthrow of Science as established by Galileo and Newton.
Sorry for the typo, it's late. To the point, however, nonsense. As I have stated many times, science must posit a natural cause for the formation of a hypothesis. It does not require the insistence that only natural causes exist. One is a research method, the other a metaphysical assertion. Science does not equal materialism.