One signal

Jürgen Schmidhuber has revisited a long-running strand of his research, linking discrete computable universes to his prediction that large-scale general-purpose quantum computation would not work.

Why it is worth noting

This is not a new paper or experimental result. It is a useful primary-source breadcrumb pointing back to work published between 1996 and 2012, and a reminder that confident predictions about computing's future tend to enjoy very long shelf lives.

Discuss: Does revisiting an old prediction sharpen today's debate, or does it need fresh evidence before it carries new weight?

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