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Comment by somethingroma | Hacker News Reader

"Does the external world exist, as it so concretely seems?"

I know this is not the direction of the paper (or question) but physics already gives us an astounding 'No!'.

Only if you subscribe to some pretty tortured interpretations of quantum mechanics. QM still describes an objective state of the external world, and exactly how it changes over time.

I don't think that's what the poster meant. I think it was probably more along the lines of how you experience e.g. 'light' vs. what it actually is:

   https://www.youtube.com/watch?v=FjHJ7FmV0M4

(The vast majority of light is effectively invisible to you.)

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