Plato on the need for expertise

“[Lysimachus] ‘I am asking you, Socrates, because it seems as if our council needs someone to act as umpire.’

[Socrates] ‘What, Lysimachus? Do you intend to follow whatever course the majority of us recommends?’

[Lysimachus] ‘Yes, what alternative is there, Socrates?’

[Socrates] ‘Imagine there was some discussion about the kind of athletic training your son should practice: would you be influenced by the majority of us, or by the man who happened to have trained and exercised under a good coach. … ...