Cawifre

I found this reference to some author origin more than a century old: https://ingeb.org/Lieder/thenight.html

Edit: I misread the heading. J. Mark Sugars is a contemporary source who put together this representative example of a century-old joke.

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I have Aphantasia and ADHD, and I can confirm that the sleep/wake boundary allows for some startling visualizations.

Apparently it is a different visualizing scheme that dreaming uses, so practicing visualizing in that half-asleep state doesn’t strengthen the bit that is used while awake.