If the universe is indeed an objective place that exists independent of our thoughts and consciousness, then Rob's points all have merit. But they pre-suppose the existence of an objective universe, which by itself is an unprovable assumption. Consequently, everything based on the objective model must remain in doubt because the foundation is merely an educated guess. And in fact there are many today who feel it's an inaccurate one, myself included. When you have direct personal experience that contradicts the notion of objective reality, it can be very unsettling at first, but then you come to realize that we live in a far more wondrous place than previously imagined, and that's when things begin to get interesting.