The first time I considered the notion of a fundamentally mental ontology--and many times since--the notion of the universe being perceivable fundamentally as mind-like seemed obvious per se. Since we examine the world through mental means, something would have to explicitly violate mentation as the ontological primitive for idealism not to be true, at least for a human. Thus, Karl Popper-style, as physicalism absorbs punishment from idealism, it is increasingly falsified and tottering about on shaky legs. It is, in fact, doomed.