Joe and Rolf discuss the ideas of perceptual psychologist Donald Hoffman, who has argued that our perceptual systems have no access to reality, since evolution is driven by fitness functions, not objective truth. He has also argued that our perception is a user interface (like a desktop on a computer, or a VR headset), and that objects such as the moon don't exist when we are not apprehending them.  

Hoffman, Donald. The case against reality: Why evolution hid the truth from our eyes. WW Norton & Company, 2019.

Bagwell, J. N. (2023). Debunking interface theory: why Hoffman’s skepticism (really) is self-defeating. Synthese, 201(1), 25.