If your perception isn’t objective…

How do you know what’s actually real?

S2 EP. 029

In Part 2 of this Decoded series, Elisabeth McKay explores one of the most unsettling questions in neuroscience and psychology: How does self-deception form, and why does it feel indistinguishable from truth?

Building on the foundation established in Part 1, this episode examines how attention, memory, emotional salience, prediction, and past experiences shape the reality you experience every day. Elisabeth explains why two people can experience the same event and leave with completely different conclusions—and why certainty itself may be one of the brain’s greatest illusions.

In this episode:

• Why attention determines your experience of reality
• The Reticular Activating System (RAS) explained
• How the salience network decides what matters
• Why memory is reconstructed—not replayed
• Narrative formation and emotional meaning
• Why relationships break down over interpretation
• Trauma, prediction, and self-fulfilling prophecies
• The psychology of self-deception
• Reality vertigo and cognitive dissonance
• Plato’s Cave and modern neuroscience
• Consciousness and the “hard problem”
• Simulation theory through a neuroscience lens
• Why objective truth still matters

This conversation connects neuroscience, psychology, philosophy, and behavioral science to challenge one of our deepest assumptions—that the way we experience reality is reality itself.

If Part 1 explained how your brain constructs reality, Part 2 explains why that construction becomes so convincing that it feels like truth.

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SHOW NOTES

00:00 – Why You Must Watch Part One First

00:33 – Color, Touch, and Pain Are Constructed

02:19 – How Childhood Shapes Pain Perception

03:19 – Predictive Processing Changes Reality

04:18 – Why Your Brain Filters Reality

06:12 – The Reticular Activating System Explained

08:08 – The Salience Network and Emotional Attention

10:55 – Why Memory Isn’t a Recording

14:28 – How the Brain Creates Stories

16:51 – The Golden Arches of Doom

18:06 – Why Relationships Feel So Misunderstood

20:45 – Self-Awareness vs. Objective Reality

22:08 – How Break Method Interrupts Distortion

23:15 – Reality vs. Interpretation

24:37 – What Happens When Perception Becomes Distorted

27:12 – Trauma, Fear, and Predictive Loops

30:06 – Why Jealousy Is Built on Prediction

31:22 – Feelings Are Real—Interpretations May Not Be

33:10 – Emotional Dysregulation Hijacks Reality

34:45 – What Self-Deception Actually Is

37:12 – Reality Vertigo Explained

38:28 – Does Objective Truth Exist?

39:08 – Plato’s Cave and Consciousness

42:14 – The Hard Problem of Consciousness

44:40 – Simulation Theory and the Brain

46:19 – Can We Ever Know Objective Truth?

47:42 – Part Three: What Is Mental Illness?

48:37 – End

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