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michael_nielsen's profile
michael_nielsen
michael_nielsen
michael_nielsen
@michael_nielsen

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michael_nielsen

@michael_nielsen

Searching for the numinous. Co-purveyor of https://quantum.country/ 

San Francisco, CA
michaelnielsen.org
Joined July 2008

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    1. Steven Smith‏ @stalcottsmith Jan 10
      • Report Tweet

      I reject the idea that energy consumption is inherently bad. We want more energy for everyone. Energy is freedom. You could measure economic and social progress largely by the useful energy individuals have at their disposal.

      68 replies 286 retweets 1,485 likes
    2. JJ 「cιtιƶεɳƒιvε」  🏴‍☠️‏ @CTZN5 Jan 10
      • Report Tweet
      Replying to @stalcottsmith @cal_abel

      On this topic, most ppl yet again wind up nostril-deep in the intellectual tarpit dubbed Goodhart's Law While true that not all "energy consumption" lands on the "good" side of things, to avoid this tarpit consider another framing: To consume no energy *would be* inherently bad

      1 reply 0 retweets 0 likes
    3. David Manheim‏ @davidmanheim Jan 10
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      Replying to @CTZN5 @stalcottsmith @cal_abel

      If we're talking about security of cryptocurrency, no, energy consumption is a cost to be reduced. It's not a positive factor in any way. Computation with no power consumption is physically impossible, but minimizing energy consumption is a goal - not a metric getting gamed.

      2 replies 0 retweets 1 like
      michael_nielsen‏ @michael_nielsen Jan 11
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      Replying to @davidmanheim @CTZN5 and

      Reversible computing can be used to do computing with (in principle) zero energy consumption.

      12:46 AM - 11 Jan 2019
      • 6 Likes
      • Joseph Van Name Robin Hanson Tequehead Alexander Kruel David Manheim Ming 靖源
      1 reply 0 retweets 6 likes
        1. New conversation
        2. michael_nielsen‏ @michael_nielsen Jan 11
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          Replying to @michael_nielsen @davidmanheim and

          The proof is usually attributed to a 1973 paper by Bennett, but I particularly like the explanation of Fredkin and Toffoli and their billiard ball model of computing: http://fab.cba.mit.edu/classes/862.16/notes/computation/Fredkin-2002.pdf …

          1 reply 0 retweets 3 likes
        3. David Manheim‏ @davidmanheim Jan 11
          • Report Tweet
          Replying to @michael_nielsen @CTZN5 and

          David Manheim Retweeted David Manheim

          Yes, my bad. @anderssandberg and @robinhanson have pointed this out to me, and I should have remembered. I definitely don't understand the physics yet, but thanks for pointing to the paper - it looks like it might be a clearer explanation than I've yet seen. But the point stands:https://twitter.com/davidmanheim/status/1083645585784299520 …

          David Manheim added,

          David Manheim @davidmanheim
          Replying to @CTZN5 @stalcottsmith @cal_abel
          You're gonna lecture me about Goodhart's law? 1) No, in this case the metric functions as a close causal approximation of the goal in the region we're discussing. Divergence in tails is always a problem, (see: regressional goodhart - https://arxiv.org/abs/1803.04585 ) but we aren't there.
          1 reply 0 retweets 3 likes
        4. 9 more replies

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