> the two Blended queries get rewritten as Boolean queries themselves, with 
> each (modified) TermQuery as a SHOULD clause
> the nested Boolean queries get flattened, since they are nested disjunctions
> the Term queries (some of which are actually Boost queries) are deduplicated, 
> with one of the two TermQuery and its modified TermStates being picked at 
> random (the randomness is due to the HashSet underlying Lucene's MultiSet).

This seems a bit worrisome in itself -- the data structure supporting
the implementation should not affect the selection.

-- 
Regards,

Atri
Apache Concerted

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