Freeman Dyson: Analog Computing and Turing's Cathedral

Hillis talked about parallel computing, and Feynman talked about quantum computing, two subjects which later turned out to be important. But to me, the most exciting news at the meeting came from Pour-El and Richards, two mathematicians who were then at the University of Minnesota. Marian Pour-El and Ian Richards proved a theorem that says in a mathematically precise way that analog computers are more powerful than digital computers...

The Pour-El-Richards theorem does not prove that analog brains are better than digital brains. It only makes that conjecture more plausible.

- Freeman Dyson

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