Mere Reality is the fourth book contained in the ebook Rationality: From AI to Zombies, by Eliezer Yudkowsky. It focuses on practical and philosophical questions related to science and the character of physical law.

Mere Reality contains six sequences of thematically connected essays, plus the stand-alone essay A Technical Explanation of Technical Explanation. These are all collected in the Rationality: From AI to Zombies ebook, but the essay names below also link to the original blog posts.