I had an interesting dream the other night. I was on a spaceship and due to a setting, some people saw an illusion (luxury furniture, plush rugs, a tidy space) while others saw reality (cheap furniture, threadbare rugs, a mess). It was like a movie scene that magically changes an Ikea chair into an upscale-designer one with the wave of a hand.

The dream got me thinking about reality and perception. How do we know what we’re sensing is the truth? More in this week's post.