Yes, that question is unanswerable. But I thought we talking about our own universe here though not going into another. The point of the anthropic principle applied to our universe is that the natural laws of this universe are more than capable of supporting intelligent life (which is obvious anyway).I am not happy with the way you say that a universe that has almost exactly the same natural laws as ours ie. it can be observed, but thta cannot produce life.
Obviously, for us to enter and observe it, it would have to have the natural laws to support life, but the kind of universe I mentioned above is not impossible in itself, or am I wrong?
-EDIT- I truly believe that the question is basically unanswerable by it's very nature, our limited understandings not being able to outright deny such a universe at all.