The context was a conversation with tornapart who commented that they accept the scientific case for evolution but still believe that a creator started the process.
If we are going to take that position — theistic evolution — then we have to commit to methodological naturalism and not resort to arguments from design otherwise we have stepped outside of science into the realm of superstition and creationism.
The part in italics is assumed from the context as any intelligent and well-intentioned reader can clearly see.
I see you have still to read your first science book Hooby (or any book that doesn't come with a set of crayons)