What is the correct procedure for determining the contents of perception? Philosophers tackling this question increasingly rely on empirically oriented procedures. This chapter argues that this strategy constitutes an improvement over the armchair methodology of phenomenal contrast arguments, but that there is a respect in which current empirical procedures remain limited: they are unimodal in nature, wrongly treating the senses as isolatable. The chapter thus has two aims: first, to motivate a reorientation of the admissible contents debate into a multimodal framework. The second is to explore whether experimental studies of multimodal perception support a so-called Liberal account of perception’s admissible contents. The chapter concludes that the McGurk effect and the ventriloquist effect are both explicable without the postulation of high-level content, but that at least one multimodal experimental paradigm may necessitate such content: the rubber hand illusion. One upshot is that Conservatives who claim that the Liberal view intolerably broadens the scope of perceptual illusions, particularly from the perspective of perceptual psychology, should pursue other arguments against that view.