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

[Wolfgang Laun]

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