Modern Day Academia: If Scientific Methods Take You to Non-material Causes, Then Those Results Must be Rejected
Methodological naturalism aims to protect "science" from certain conclusions. This rule says that the scientific method is a great tool for obtaining knowledge about our world (which indeed, it is!), but if scientific methods take you to non-material causes, then those results must be rejected. Non-material explanations are never allowed. Never. It's a great way to limit your empirically based search for truth to pre-determined outcomes.