[rules-dev] Perhaps an undocumented feature of Backward Chaining?

This is related to the example in 2.1.2.8., Backward Chaining. Using the same rules and queries given there, the sequence of fact insertions insert( new Here( "table" ) ); insert( new Edible( "peach" ) ); insert( new Location( "peach", "table" ) ); results in nothing being seen and nothing being edible, whereas insert( new Edible( "peach" ) ); insert( new Location( "peach", "table" ) ); insert( new Here( "table" ) ); results in the obvious and expected result. There is no difference w.r.t. using '?' in front of query names. -W