The claim that the mind-body problem was debated in antiquity and the middle ages is a matter of historical fact and common knowledge, requiring no formal citation.
The historical discussion of the relationship between mind, soul, and body by ancient and medieval philosophers (such as Plato, Aristotle, and medieval scholastics) is a matter of standard historical record and common knowledge. None of the retrieved papers specifically test or contest this historical truism as a focal hypothesis, making formal citation unnecessary under Step 0 rules.