It is much easier to piece a mosaic together, if we have a pattern or model to rely on. In the research of origins, however, large sections of the model are missing and there are but few puzzle pieces. In the absence of a model, one is obliged to develop a suitable concept. As regards the question of origins, all persons involved in research, work on the basis of an at least rough concept of how the history of life may have been. They need a model to interpret the meaning of the mosaic pieces.
Such a model can vary greatly. Today, most scientists allow only for natural processes as cause for the development of life and its variety. Such an approach entails an evolutionary doctrine. Alternatively, the creationist doctrine presupposes a creative act of a transcendent prime mover. The doctrinal designation of evolution and creation have been deliberately chosen as in their entirety, as both views transcend both natural science and scientific theories. The reasons for this claim are given in the article on scientific theory.