Dave,
Great question! When we say 9 operators, we're talking about language primitives, not operators you would write in the syntax (since the syntax is one of many possible interfaces to Eve, the way language primitives are exposed might be different in each one)
The 9 are: search, bind, commit, not, aggregate, choose, union, add, remove
Maybe we can spell this out somewhere so others don't have to wonder.
Corey