If the former, that's not the debate. The debate is around organisms' movement to more complex forms from simple forms as one species gives rise to another. Note the title of the thread.
The process has to be either guided by an intelligent force or happen by aimless movement of basic elements. If the latter, you must start with bare rock, water and other combinations of elements that just naturally form even today.
If life is presupposed, you must accept the existence of an intelligent designer, or you have to show how life came about and test it by using that process to create it.
Do you stipulate an intelligent designer?
What do you mean by simple and complex? There is not necessarily more information in the single celled human embryo than there is in the single cell of the amoeba. The amoeba has a larger genome.
Different information, perhaps, but not more.