For purposes of this discussion.
Chance = non-teleological causes that happen to result in particular effects via regularities referred to as “lawful” and stochastic in nature.
Purpose = teleological causes that are intended to result in particular effects; the organization of causes towards a pre-defined future goal.
My question is: can chance causes generate all of the effects normally associated with purpose,but without purpose? IOW, is purpose necessary to produce all, most, or some apparently purposeful effects, or is purpose, in effect, only an associated sensation by-product or side-effect that isn’t necessary to the generation of any particular effect normally associated with it?