What would Plato think of a sentence of solitary confinement for life for these terrorists? Explain your answer.

I read this so long ago in philosophy class. As I recall, when I could stay awake, punishments really depended on the severity of the crime. Generally he thought that punishments were in the interest of the perpetrator. So it really depends on what the "terrorist" did. Generally for killing innocent people, both at Athens and in Plato's Laws, capital punishment for murder was not to be inflicted if the offender was willing to go into exile. So I suppose if solitary confinement means exile he might agree.