I would tell him to explain what separates western hemisphere from eastern hemisphere regardless north or south of the equator and each end of the polar axis of this planets rotating results simultaneously revolving around a star perpetually balancing 3rd from the sun in this specific universal position so far as recorded genetic outcomes have never been same ancestor born in two separate generation gaps and it won't matter if cloned or natural selection.
simple compounding chromosome transfers via reproductive cells from already existing ancestors in specific ancestral lineages, generation gaps since inception to living native to this universal location only.
teaching each incoming replacement how to behave socially cradle to grave to honor what their own ancestry did last 2 centuries, current events explain why history never corrected self deception yet.
When people take sides ignoring the same outcome of their own conception. the actual Original Sin.