Julian Baggini invites readers to test whether their beliefs are as consistent and reasonable as they assume.

The book uses philosophical puzzles, short questions, and thought experiments to expose contradictions in everyday opinions. The focus stays on Do You Think What You Think You Think? Book's own material, so the description explains what the reader actually meets on the page.

Its summary is a challenge to intellectual honesty: thinking well requires noticing where certainty, habit, and logic collide. That gives the reader a clearer sense of the subject, structure, and practical or imaginative value of the book.