r/neurophilosophy

Some Redditors on have argued against the idea that neural activity causes conscious experiences. The purpose of this post is to offer an abductive argument: our inference to the best explanation is that brains cause conscious experiences, like feeling pain.

First, what we're looking for is a causal claim: we want something that has the form "____ causes conscious experiences" For example, we might say that nothing causes conscious experiences, or that the brain causes conscious experiences, or some other claim.

Second, we want an explanatory thesis: we want a causal claim that can be the explanans of a causal explanation. A causal explanation has the form of "___ because ___", and the explanans would be what follows the "because", it is what is doing the explaining.

Third, our explanandum (or what needs to be explained) is our available evidence. Consider the following two pieces of (weak) evidence:

1. Conscious experiences strongly correlate with neural activity

2. Conscious experiences do not appear to strongly correlate with anything non-physiological

There might be more evidence than this, but for the sake of discussion, I'll limit the discussion to just this evidence (for now).

Ideally, our causal claim ought to be consistent with the truth of our evidence & can explain why our evidence is true. If there is more than one causal claim that is consistent with our evidence & can explain our evidence, then we might appeal to theoretical virtues, like parsimony, to help us decide which claim we ought to prefer.

Now, the following causal claim: the brain causes conscious experiences. Is this claim consistent with our evidence, & can it explain our evidence?

• Is it consistent with the truth of our evidence?

  • If the claim that the brain causes conscious experiences is true, the truth of this claim would be consistent with the fact that it is true that conscious experiences strongly correlate with neural activity.

  • If the claim that the brain causes conscious experiences is true, the truth of this claim would be consistent with the fact that it is true that conscious experiences do not strongly correlate with anything non-physiological.

• Can it explain why our evidence is true?

  • Our causal explanation would be: conscious experiences strongly correlate with neural activity because the brain causes conscious experiences.

    • If the claim that the brain causes conscious experiences is true, then the truth of this claim would explain why it is true that conscious experiences strongly correlate with neural activity. While the existence of strong correlations does not entail causation, causation does entail the existence of strong correlations.

  • Our causal explanation would be: conscious experiences do not strongly correlate with anything non-physiological because the brain causes conscious experiences.

    • If the claim that the brain causes conscious experiences is true, then the truth of this claim would explain why it is true that conscious experiences do not strongly correlate with anything non-physiological. This is the sort of thing we would expect if the brain caused conscious experience.

In contrast, consider another claim that is sometimes popularly espoused on : the brain is a radio-like filter of conscious experiences. First, notice that this is not a causal claim. Second, it doesn't appear to be an explanatory claim. For example, consider our evidence & how this claim would feature in a causal explanation:

• Can it explain why our evidence is true?

  • Our would-be causal explanation would look like: conscious experiences strongly correlate with neural activity because the brain is a radio-like filter of conscious experiences.

    • If it is true that the brain is a radio-like filter of conscious experiences, then it is unclear whether this explains why it is true that conscious experiences strongly correlate with neural activity. Why should this evidence be true given the truth of the explanatory claim? Why should we expect these strong correlations if the brain merely acts as a filter?

  • Our would-be causal explanation would look like: conscious experiences do not strongly correlate with anything non-physiological because the brain is a radio-like filter of conscious experiences.

    • If it is true that the brain is a radio-like filter of conscious experiences, then this does not explain why it is true that conscious experiences do not strongly correlate with anything non-physiological. This is the opposite of what we would expect. If conscious experience isn't caused by the brain, but permeates the world, then why aren't there strong correlations between conscious experiences and anything non-physiological?

So, this non-causal claim also fails to explain why our evidence is true.

If there are no viable alternative causal claims that can explain our evidence besides the causal claim that the brain causes conscious experiences, then by default, it is our best explanation. Additionally, the claim that the brain causes conscious experiences seems to be consistent with many metaphysical views, such as physicalism, property dualism, hylomorphism, and so on.

For those who want to argue against this, the assignment is pretty straightforward: provide a causal claim, show it is consistent with our evidence, and show that it can explain why our evidence is true. Each of these steps needs to be met before we can assess whether this alternative proposal is a better explanation than the claim that the brain causes conscious experiences.

Lastly, one response might be that the evidential basis is too restrictive. For example, some Redditors claim that there really are veridical near-death experiences, people who really do recall past lives, certain drugs really do decrease neural activity while increasing vivid experiences, and so on. I take it that these claims are dubious, while the proposed evidential basis is largely uncontroversial. However, suppose we grant these claims for the sake of argument. If so, then our evidential basis would be, for example, that:

1. Conscious experiences strongly correlate with neural activity

2. Conscious experiences do not appear to strongly correlate with anything non-physiological

3. There are highly accurate near-death experiences

4. ...

I take it that this doesn't undermine the argument that our best explanation for what causes conscious experiences is the brain. Critics of the view that the brain causes conscious experiences will need to show that their proposal explains the evidence better than the alternative. In the absence of such arguments, we lack reasons to think there is a better proposal than that the brain causes conscious experiences.

I'm not a scientist. I get strong visual imagery when I meditate, followed one image into a long rabbit hole, and landed on a specific question I can't find an answer to. If it's been done, link me the paper and I'll go read it. Below is the idea, the work I found that already covers most of it, and the one piece I think might still be open.

The idea. A conscious "moment" is a brief burst where many of the brain's standing-wave modes fall into phase. The felt "now" is one of those bursts, not a smooth stream.

Prior work I found, so I'm not first:

• Local pre-stimulus alpha phase predicts whether you detect a faint flash (Busch, Dubois & VanRullen 2009, the perceptual-cycles idea).

• The cortex decomposes into global standing-wave eigenmodes whose repertoire tracks level of consciousness, collapsing under anesthesia and expanding on psychedelics (Atasoy et al. 2016, connectome harmonics).

• The brain runs in a metastable regime of transient alignment bursts (Tognoli & Kelso 2014, The Metastable Brain).

• Alpha frequency roughly sets perceptual temporal resolution (Samaha & Postle 2015, though it's contested, with a 27-experiment living meta-analysis still arguing about it).

• The bridge is getting built now. 2025–2026 preprints link intrinsic connectome dynamics to trial-by-trial perception.

Most of this is taken. I want that on the record before anyone has to correct me.

Has anyone built a single time-resolved number, a whole-brain harmonic order parameter R(t) from the connectome eigenmodes (Atasoy's modes summed Kuramoto-style into one alignment value), and then run the head-to-head against local alpha phase? We already know global state matters and local phase matters on their own. My question is narrower. In one model, tested out of sample, does the global alignment number beat the local phase number? And does the rate of detected moments track the metastable dwell-time of the dominant mode instead of the alpha period?

If someone has run that, link it and I'll go read it.

Consistent equations don't make any of this true. The leap is the claim that an alignment burst is a moment of experience. That's an assumption, not a result.

If R adds nothing over local phase, with no improvement in cross-validated prediction once you add surrogate stats and controls for the non-sinusoidal-waveform artifact that fakes this kind of effect, then the global-alignment framing is elegant relabeling and local phase was enough.

My questions for you:

1. Has the R-vs-local-phase head-to-head been run? Link me.

2. If not, is there an obvious reason it wouldn't work that I'm missing?

3. What's the closest existing thing I should read instead of reinventing it?

I care more about whether it's true than whether it's mine. Tear into it.