Essay: The Neural Illusionist: Why Your Entire World Is a Genius 3D Mistake of Your Brain

This essay explores a fundamental property of human perception: the brain never receives direct information about the three‑dimensional world; it operates exclusively with flat (2D) signals — light waves falling on the retina. Based on this fact, a new metaphor of perception is proposed, using an analogy with Fermat's Last Theorem: 2D data are the "integer" axioms (n=2), while 3D perception is a complex, continuous solution (n=3) that the brain computes in real time. The dispute between "flat‑Earthers" and scientists is analyzed: both sides are right in different aspects, but the truth lies in recognizing the entire computational process. It is concluded that consciousness is not a passive reflection of reality but an active, continuous "proof of a theorem" about the structure of the world.