This book investigates the underlying cognitive mechanisms that trigger skeptical doubt in the human mind. N. Ángel Pinillos, a philosopher specializing in epistemology and cognitive science, proposes the existence of a latent mental rule that governs how individuals process uncertainty. By examining the functional purpose of this rule, the author argues that these skeptical inclinations are not merely philosophical exercises but are deeply embedded in our cognitive architecture, potentially contributing to specific psychological pathologies.

Experts in epistemology and cognitive science view this work as a specialized contribution to the study of how mental rules influence belief formation. Readers frequently note the academic density of the prose, which requires a foundational understanding of philosophical inquiry to fully grasp the author's arguments.