:::::::::Yes, the "is-ought" problem is important in the science of morality. However, I don't believe the major philosophical sources accept that Rand in any way solved that probem ("potentially" or otherwise); I believe her views are generally considered fringe. As to failing to see why "the answer to #2" should be "experiments and popularity are required" — well, of course you fail to see that, because that is not the answer. The answer (for non-inclusion) is that Rand's solution is not considered noteworthy. ~