Hi,I have an issue I'm trying to track down and won't to rule out the data being an issue. Running 5.5 ExpertI have a Fact; let's say "Person"Class Person {private String fName;private String lName;private String ssn;getters/setters@Overridepublic boolean equals(final Object obj) { if ( obj == null ) return false; if(obj instanceof Person){ final Person other = (Person) obj; return Objects.equal(ssn, other.ssn); } else{ return false; }} @Override public int hashCode(){ return Objects.hashCode(ssn); }}Now if I insert 2 person objects with the same ssn. Actually if my LHS is $list : ArrayList() collect( Person() ), do I expect 2, 1, or 0 for my arraylist. What is seeing is that the arraylist is 0 but that doesn't make sense to me and I think there is another underline issue. -- View this message in context: http://drools.46999.n3.nabble.com/Duplicate-Facts-with-overriden-equals-h... Sent from the Drools: User forum mailing list archive at Nabble.com.