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Content determination in dreams supports the imagination theory

DOI: 10.1007/s11098-024-02250-3
Gregory, D. (2024). Content determination in dreams supports the imagination theory. Philosophical Studies, 181(11), 3037–3057. doi:10.1007/s11098-024-02250-3

Abstract

There are two leading theories about the ontology of dreams. One holds that dreams involve hallucinations and beliefs. The other holds that dreaming involves sensory and propositional imagining. I highlight two features of dreams which are more easily explained by the imagination theory. One is that certain things seem to be true in our dreams, even though they are not represented sensorily; this is easily explained if dreams involve propositional imagining. The other is that dream narratives can be temporally segmented, involving events which take place across long spans of time; this makes sense if dreams involve sensory imagining, for we often sensorily imagine narratives during wakefulness in the same way. The two considerations are unified by the fact that both highlight forms of content determination characteristic of imagining.

Authors

  • Daniel Gregory1

What This Study Is About

Researchers wanted to know if dreaming is more like having a hallucination (seeing things that aren't there but believing they are real) or more like imagination (where your brain "decides" what you are experiencing). The study explores whether our brains use the same "creative tools" to build dreams that we use to imagine things while we’re awake.

How They Studied It

This wasn't a lab experiment with heart monitors or brain scans. Instead, it was a philosophical "thought study." The researcher analyzed the way dreams behave—like how they jump through time—and compared them to mental imagery (the ability to picture things in your mind). He also looked at previous data from other scientists, including studies on how long it takes people to perform tasks in their dreams.

What They Found

The researcher found two big clues that suggest dreaming is a form of imagination:
  • The "Labeling" Trick: In dreams, you often just *know* who someone is, even if they don't look like themselves. For example, you might see a cat but "know" it’s actually your best friend. This is exactly how imagination works—you "label" the thoughts you create.
  • The Movie Edit: Dreams have "time skips." You might be at a bank robbery, and a second later, you’re in the getaway car. Real-life experiences (and hallucinations) usually feel continuous, but dreams skip the boring parts, just like a movie or a story you're imagining.

What This Might Mean

This suggests that dreaming is a creative act of the mind rather than just a "glitch" in our perception. For people with aphantasia—the "blind mind’s eye" where people cannot voluntarily visualize imagery while awake—this is fascinating. It suggests that even if you can't "see" pictures when you're awake, your brain might still be using the same underlying "imagination machinery" to build your dream world at night.
However, because this is a philosophical argument based on logic rather than new lab tests, it "suggests" a new way of thinking rather than "proving" exactly how the brain works.

One Interesting Detail

The researcher points out that you can dream you are an accountant on vacation without ever seeing an office or a calculator. You just "stipulate" (decide) it’s true. This shows that dreams aren't just about the pictures we see; they are about the "facts" our brains decide to believe in the moment!
This summary was generated by AI and may contain errors. Always refer to the original paper for accuracy.