Has PSI been assigned network 1?

We don't trust our peers. We only accept routes which they are
registered as providing transit for in the PRDB. When the RADB is in
use, unless PSI has a route object for in the RADB, we still
won't trust them when they try to pass us 1/8.

Then you're back to the www.pizzahut.com( example. Reachable
from most places as long as you don't touch NSFNET/ANSNET and the PRDB.