What's the Difference Between Controversy and Unaccounted for Data?

The section 5.1 probabilistic modus tolems. Now I have to confess this section lost me a little bit. It's talking about some of Brian's earliest work when you talked about errant data and how conspiracy theories claim to account for errant data that the official theories might not. So he'll say, some conspiracy theories deal with data that flat out contradicts the official account and then you also get conspiracy theories dealing with unaccounted for data. But generally it's implausible that conspiracy theorists typically rely on contradictory data as they may well be no such data even when the official account is false. Thus to the extent that conspiracy theorists rely on errant data, they must rely