I'm a bit new to Drools and Guvnor myself, but I think I can make a suggestion.
You might want to consider inserting a new fact (say "IsMinor", or whatever) to as a consequence of your first rule. Then, you can have other rules use IsMinor as a condition, which will cause them to fire. And so on. That's how I'm handling a case where I need to produce a given "Widget" based on the outcome of a rule that produces a different Widget.
I had originally modeled it differently, but then I realized that inserting new facts and reasoning upon them is a key to unleashing the power of rules effectively (at least I think so :-)).