Abstract

Virtual reality is poised to be increasingly important in our lives. This dissertation investigates the philosophical foundations of virtual reality, probing the metaphysics and epistemology of perceptual experiences of virtual environments. Specifically, it asks 1) what there is in virtual reality and 2) how we perceive virtual things. It defends virtual veridicalism, the view that perceptual experiences in virtual reality are as veridical as ordinary experiences. The defense consists of six chapters. Chapter 1 explains why such questions need to be addressed. Chapter 2 develops a realist view of virtual objects and properties, arguing that virtual objects exist and instantiate properties that may or may not be instantiated by ordinary physical objects. Chapter 3 presents an argument in defense of virtual veridicalism. I argue that the common criterion whereby we consider ordinary experiences veridical justifies the veridicality of perceptual experiences of virtual objects and properties. Chapter 4 looks for a representationalist account of perceptual content that could lend theoretical support to my defense of virtual veridicalism. I argue that none of the currently prominent representationalist views succeed. Rather, Chapter 5 proposes a new account — role representationalism — to achieve the goal. This account claims that, despite some differences in perceptual contents between the virtual and ordinary physical domains, a fundamental aspect of contents remains constant in perceptual experience across both domains, and it is the constant aspect that grounds the veridicality of perceptual experiences of virtual objects and properties. Chapter 6 assesses Chalmers’s (2017) defense of virtual veridicalism and argues that his defense cannot succeed unless presupposing role representationalism as the underlying theory of content of perceptual experiences. Finally, I conclude that 1) there are virtual objects and properties in virtual reality, and 2) we perceive these entities in a way that is as veridical as our perception of ordinary objects.