Mike's rhetorical argument: even if naming is 'only discernment,' no one would accept a stranger renaming their child or village -- naming inherently involves authority.

Mike poses a practical test: if naming were purely about discernment with no authority component, then any perceptive person should be able to name your child. But everyone intuitively responds with 'By what authority do you presume to name my kid?' This shows naming inherently involves a claim of authority or relational standing, not just discernment of traits.