This book investigates whether the sense-datum theory remains a viable and necessary framework for understanding human perception despite decades of academic dismissal. Howard Robinson, a scholar of philosophy, utilizes historical analysis and logical critique to challenge the prevailing consensus in epistemology. He argues that the standard objections raised by physicalists and Wittgensteinian thinkers against sense-data are fundamentally flawed, proposing a re-evaluation of the theory to resolve persistent problems in the philosophy of mind.

Experts recognize this work as a significant, albeit controversial, challenge to the dominant physicalist paradigm in contemporary philosophy. Readers frequently note the academic density of the prose, which requires a foundational understanding of epistemological terminology to fully grasp the author's arguments.