scene 1 8.How do you think this line might be prophetic:"how dreadful it is when the right judge judges wrong!"(sentry)

All those who judge find themselves in a position to make a mistake.  Creon is warned in this play many times to not continue his vengeance against the dead Polyneices.  He judges wrongly when he says the dead prince should no be buried.  It is ironic because he is so sure he is right, but the truth is that his hubris causes him to lose his entire family (son and wife) as well as his future daughter-in-law.  His decision is a wrong decision and he suffers for making it.