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vgr's profile
Venkatesh Rao
Venkatesh Rao
Venkatesh Rao
@vgr

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Venkatesh Rao

@vgr

Conversational account. For work follow @ribbonfarm, @breaking_smart, @artofgig. Tweets are 90% vacuous views, apathetically held. Mediocritopian. IKEA builder.

Los Angeles, CA
venkateshrao.com
Joined August 2007

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    1. maxwellroe‏ @maxwellroe Jan 10
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      Replying to @vgr

      There is something with enormous gravity influencing the movement of astronomical systems in ways for which we have no explanation. It is meant to be a placeholder until we can figure it out. This has worked before, e.g., Neptune, and perhaps planet 9 soon.

      1 reply 0 retweets 0 likes
    2. maxwellroe‏ @maxwellroe Jan 10
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      Replying to @maxwellroe @vgr

      Trust the model that has substantial predictive power, then back fill the holes as we learn more.

      1 reply 0 retweets 0 likes
    3. Venkatesh Rao‏ @vgr Jan 10
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      Replying to @maxwellroe

      Except Neptune distortions didn't require assumption of exotic types of matter, just an undetected lump of regular matter, so the analogy doesn't quite work. It's not a limitation of instruments or observations. It's an ontological limitation of theory.

      1 reply 0 retweets 1 like
    4. maxwellroe‏ @maxwellroe Jan 10
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      The gravity is there, begging an explanation.

      1 reply 0 retweets 0 likes
    5. Venkatesh Rao‏ @vgr Jan 10
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      Replying to @maxwellroe

      Unless "gravity" is the wrong idea :D

      2 replies 0 retweets 1 like
    6. maxwellroe‏ @maxwellroe Jan 10
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      Replying to @vgr

      A fair point. But, it’s impossible to deduce any real meaning from the universe around us, if we don’t stand upon the foundations of a few basic assumptions about the universe. Even if they’re only close approximations.

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    7. Venkatesh Rao‏ @vgr Jan 10
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      Replying to @maxwellroe

      "gravity" itself has undergone 2 redefinitions that completely altered its ontological character. It was a "force" under Newton, a space-time curvature effect under Einstein, and now a "wave-particle" under quantum gravity type theories. So the word doesn't matter much.

      2 replies 0 retweets 1 like
    8. maxwellroe‏ @maxwellroe Jan 10
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      Replying to @vgr

      Gravity was a “force” under Newton, and yet we were able to infer the movement of an entire solar system. Gravity was a space-time contortion under Einstein, and yet we were able to correct for relativity in GPS satellites. My point is that it’s still useful.

      1 reply 0 retweets 0 likes
    9. Venkatesh Rao‏ @vgr Jan 10
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      Replying to @maxwellroe

      I'm not sure what you're arguing about tbh. There are observations that admit certain unsatisfactory descriptions under current models. It is okay to call unsatisfactory things unsatisfactory as far as I'm concerned.

      3 replies 0 retweets 1 like
    10. maxwellroe‏ @maxwellroe Jan 10
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      Replying to @vgr

      It’s OK to call them that, it’s just not useful.

      1 reply 0 retweets 0 likes
      Venkatesh Rao‏ @vgr Jan 10
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      Replying to @maxwellroe

      It's useful to me. Labeling things unsatisfactory is the starting point for thinking about them for me.

      11:50 AM - 10 Jan 2020
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      • Karen Karenina Taylor Pearson maxwellroe mikeelias.com 💡📈
      2 replies 0 retweets 4 likes
        1. maxwellroe‏ @maxwellroe Jan 10
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          I see and that makes sense. I guess my point is, dark matter isn’t usually claimed as the final answer, it is well known as a placeholder. I agree it’s unsatisfying; and just reiterating that placeholders are valuable.

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        1. maxwellroe‏ @maxwellroe Jan 10
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          Replying to @vgr

          Sorry if that reply seemed snarky. It wasn’t meant to be.

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