•  23
    Theories on the Landscape: an Orthogonal Approach
    Journal of Consciousness Studies 33 (1): 40-56. 2026.
    Assessing theories of consciousness is a challenge. Normative scientific methodology, including falsification and prediction, is notoriously difficult when addressing phenomenal consciousness. For example, it is often less than obvious that the claimed predictions of theories reflect the actual essences of those theories. I suggest two 'orthogonal' approaches that, while not dispositive in principle, might be insightful in practice. The first is a comparison with other theories using what I call…Read more
  •  9986
    Artificial intelligence is sparking unprecedented claims about machine minds — but are today’s systems really conscious? In this primer, we disentangle the myths, misconceptions, and confusions fueling the global debate. Roadmap: Section One: Background The Core Concept of Consciousness The Problem of AI Consciousness The Human Benchmark Problem Approaching the Problem of AI Consciousness on a Case by Case Basis Section Two: Conceptual Distinctions Intelligence Versus Consciousness Sentience Ve…Read more
  •  3456
    A Landscape of Consciousness: Toward a Taxonomy of Explanations and Implications
    Progress in Biophysics and Molecular Biology 190 (August 2024): 28-169. 2024.
    Diverse explanations or theories of consciousness are arrayed on a roughly physicalist-to-nonphysicalist landscape of essences and mechanisms. Categories: Materialism Theories (philosophical, neurobiological, electromagnetic field, computational and informational, homeostatic and affective, embodied and enactive, relational, representational, language, phylogenetic evolution); Non-Reductive Physicalism; Quantum Theories; Integrated Information Theory; Panpsychisms; Monisms; Dualisms; Idealisms; …Read more
  •  787
    The Origin and Significance of Zero: An Interdisciplinary Perspective (edited book)
    with Peter Gobets
    Brill. 2024.
    Zero has been axial in human development, but the origin and discovery of zero has never been satisfactorily addressed by a comprehensive, systematic and above all interdisciplinary research program. In this volume, over 40 international scholars explore zero under four broad themes: history; religion, philosophy & linguistics; arts; and mathematics & the sciences. Some propose that the invention/discovery of zero may have been facilitated by the prior evolution of a sophisticated concept of Not…Read more
  •  96
    The Mystery of Existence: Why Is There Anything At All (edited book)
    with John Leslie
    Wiley-Blackwell. 2013.
    This compelling study of the origins of all that exists, including explanations of the entire material world, traces the responses of philosophers and scientists to the most elemental and haunting question of all: why is _anything_ here—or anything _anywhere_? Why is there something rather than nothing? Why not nothing? It includes the thoughts of dozens of luminaries from Plato and Aristotle to Aquinas and Leibniz to modern thinkers such as physicists Stephen Hawking and Steven Weinberg, philos…Read more