Search Syntax | Duplicate Filters

Hi Overthere,
I’m looking for a new rss-reader and would like to give Newsblur a shot.

While testing the free version a few questions popped up:

  1. Does it have an advanced search syntax like e. g. Google search

  2. Does it have Duplicate Filters on Folders and / or across Feeds or only within a Feed

  3. On what metrics are duplicates identified? Only 1:1 text comparison on Meta- / Content-fields or with some “intelligence” on likeness of the whole article or it’s main-content?

Sorry, if this is answered anywhere but than I havn’t found it and a hint in the right direction would be great.

Thx in advance