[pixelbash]

Without leaning one way or the other I've always wondered what neuroimaging one of these experiences would look like. If nothing obvious is happening and the imagee reports a rich and detailed experience it might be persuasive.

[blancheneige]

Indeed. Severe cases of hydrocephalus [1], for example, where an otherwise functional individual is missing large portions of their brain may provide partial answers.

[1] https://med.virginia.edu/perceptual-studies/wp-content/uploa...