 Most contemporary philosophers feel entitled to postulate whatever entities are indispensable to their best explanations of well accepted phenomena. They feel the presumption of non-existence is only plausible for particular existence claims. Since the presumption only applies on a case by case basis, there is no grand methodological preference for an empty world. Furthermore, there is no burden of proof when everybody concedes the proposition under discussion. Even a solipsist agrees there is at least one thing!