What do Julia and Winston tell O'Brien that they would be willing to do for the Brotherhood, and what are their limits?

In
Chapter 16 (also designated Book II, Chapter VIII) of s depiction of a futuristic dystopian
society, , OBrien is bringingandinto an inner circle of the Brotherhood,
the fictitious resistance to the Party created to ferret out disloyalty. s Brotherhood appears
to have been modeled on the real-life organization The Trust, created by the newly-established
dictatorship in the Soviet Union and located in Western Europe.  The Trust was a fake
organization supposedly comprised of defectors from the U.S.S.R. living abroad who were deemed a
threat to the Bolshevik regime.  Once such individuals approached this phony organization, their
identities became known to the Soviet secret police, who would monitor and, occasionally, murder
them.  Orwells Brotherhood, it appears, served the same purpose for the ruling Party in
Oceania.  When OBrien sits down with Winston and Julia, he is intent on determining whether they
would be loyal...