For Evolution to be valid, we must go with scientific observable facts.
Evolution states that life arose from nonlife.
Spontaneous Generation of Life, life from nonlife was proven invalid in mid 1800's by Louis Pasteur. Evolution states that life ever evolved from simple, single cell to more complex, multicellular organisms, and finally to man via chance mutations and time. Furthermore, the mutations had to produce new genes in order for a new species to occur. For all practical and intense purposes, the mathematical probabilities of evolution equals zero. All known mutations are either benign or harmful to an organism.