[rules-users] Comparing multiple instances of the same object

I have 3 Rfrnc objects that I would like to compare and return a message if the firstNm, middleNm and lastNm of two objects match. I set up the Rfrnc objects with the names "Brian A Enderle", "Brian B Enderle" and "Brian C Enderle" and created the following rule (with the intent of building up to checking first, middle and last name). rule "LevelTwo: Duplicate Reference check" agenda-group "LevelTwo" when $i : Rfrnc($firstNm : firstNm, $middleNm : middleNm, $lastNm : lastNm) $j : Rfrnc(this != $i, firstNm == $firstNm) then System.out.println("Duplicate refernce found: " + $i.getMiddleNm() + $i.getLastNm() + ":" + $j.getMiddleNm() + $j.getLastNm()); end This produces the following output (which is what I would expect): Duplicate refernce found: CEnderle:BEnderle Duplicate refernce found: BEnderle:CEnderle Duplicate refernce found: CEnderle:AEnderle Duplicate refernce found: AEnderle:CEnderle Duplicate refernce found: AEnderle:BEnderle Duplicate refernce found: BEnderle:AEnderle While doing some testing I changed "Brian B Enderle" to "Brian A Enderle" so that now I have two Rfrnc objects with the name of "Brian A Enderle". When I rerun the same rule from above I get the following output: Duplicate refernce found: CEnderle:AEnderle Duplicate refernce found: AEnderle:CEnderle Duplicate refernce found: AEnderle:CEnderle Duplicate refernce found: CEnderle:AEnderle What I don't understand is why do I not have any return statements of "Duplicate reference found AEnderle:AEnderle". I would expect 2 of these messages, one for when the first "Brian A Enderle" object is compared to the second and vice versa. Is the "$i == this" condition checking values within the object itself? Am I missing something here as to how this rule should work? Thanks in advance, Brian Enderle