This book investigates the nature of epistemic justification by proposing a mixed methodological framework that integrates both a priori reflection and empirical inquiry. The authors, David K. Henderson and Terence Horgan, argue against the strict separation of philosophical and empirical disciplines. They introduce the concept of 'iceberg epistemology' to account for the interplay between conscious and unconscious cognitive processes, ultimately grounding human knowledge in the notion of transglobal reliability.

Experts recognize this text as a significant contribution to contemporary epistemology, particularly for its attempt to bridge the divide between analytic philosophy and empirical cognitive science. Readers frequently note the academic density of the prose, which is intended for advanced students and professional philosophers engaged in meta-epistemological debates.