The Tab of Knowledge
This Wiki is the definite source of information on campaign matters. The real world is a subset of the campaign of the campaign world though. This means that information that comes from other sources, like internet searches on the names provided in the campaign, will, as a general rule be accurate within the campaign.
Despite the GM’s honest attempts to maintain this rule there will be unfortunate slipages so always check outside information with the GM.
The Four Worlds