I think that Joe is not really a person but is actually an interactive database, or more precisely an anti-database (like matter/anti-matter or what's-the matter/doesn't matter). The database Joe obviously contains all the information that is not already in the DT. However, it only gets parcelled out when someone asks for it. It is a "do ask/do tell" system. That business about being a government worker is a ruse. Everyone knows that government workers don't know how to do computer tricks.

rich r