It must be emphasized that this argument is distinct from the design argument associated with William Paley and the Intelligent Design movement. The latter implicitly argue that objects in the world "do not" have inherent dispositions or ends, but, like Paley's watch, will not naturally have a purpose unless forced to do some outside agency. The latter also focus on complexity and interworking parts as the effect needing explanation, whereas the Fifth Way takes as its starting point "any" regularity. (E.g., that an eye has a complicated function therefore a design therefore a designer) but an argument from final cause (e.g., that the pattern that things exist with a purpose itself allows us to recursively arrive at God as the ultimate source of purpose without being constrained by any external purpose).