[rules-users] Activation attempts of rules

Hi, is there a way to observe (during runtime) when Drools evaluates the condition of which rule, meaning when it "tries" to activate a rule? I'm having a bug in my program and I can't determine whether objects are out of sync, there is a mistake in my rule or (and I started believing in that) that the rule is actually not re-evaluated, so this would be a great help for debugging. Thanks in advance! Georg