combination generator

[jeroen79]

You don't need to evaluate every possible combination.
You need to evaluate each rule one by one and if one of the rules is false you make the decision false.

decision = (rule1 And rule2 And rule3 And rule4)

Or

decision = True
decision = decision And rule1
decision = decision And rule2
decision = decision And rule3
decision = decision And rule4

decision and the rules are booleans.