question: public Set < String > addIncrementalContent ( IndependentDistribution content , boolean followPrevious ) { if ( ! paused ) { curState . addToState_incremental ( content . toDiscrete ( ) , followPrevious ) ; return update ( ) ; } else { log . info ( "system is paused, ignoring content " + content ) ; return Collections . emptySet ( ) ; } }
target:  Adds the incremental content (expressed as a distribution over variables) to the current dialogue state, and subsequently updates it. If followPrevious is set to true, the content is concatenated with the current distribution for the variable.