This shall be the second law: He who engages in retail trade must be either a metic or a stranger.
The informer, if a slave or a metic, shall be rewarded by having the article made over to him.
It is Plato's greatest concession to the metic, as the bestowal of freedom is his greatest concession to the slave.
The freed man, when liberated, does not become a citizen, but is only a non-citizen or metic.
A metic must purchase the choice fruit; but a stranger may pluck for himself and his attendant.
Plato never thinks of making the metic, much less the slave, a citizen.