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Letter: Reasons to doubt that space-time remembers

Published 23 July 2025

From Dan Kacsir, Indianapolis, US

Florian Neukart argues that a form of memory is “baked into” cells of space-time in such a way that is more or less permanent. This seems to imply that those cells are of the one-and-done variety. They can’t be reused and overwritten, per se. That also implies there is an unlimited supply of new, unused cells available everywhere, just waiting to soak up new information(21 June, p 32).

Neither of those concepts fits well with our current understanding of how reality works. Neukart also talks of a paradox concerning the destruction of information, but there is no paradox. If we ever show that information can be destroyed, it just means that the belief that it couldn’t was wrong!

Issue no. 3553 published 26 July 2025

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