Cyan comments on Rationality Quotes: March 2011 - Less Wrong

6 Post author: Alexandros 02 March 2011 11:14AM

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Comment author: Cyan 07 March 2011 04:17:55PM *  15 points [-]

What exactly qualifies some physical systems to play the role of 'measurer'? Was the wavefunction of the world waiting to jump for thousands of millions of years until a single-celled living creature appeared? Or did it have to wait a little longer, for some better qualified system... with a PhD?

John Stewart Bell, "Against Measurement" in Physics World, 1990.

Comment author: grendelkhan 25 April 2013 02:26:53PM -1 points [-]

That's pretty much the plot of Quarantine, isn't it?

Comment author: MugaSofer 25 April 2013 04:15:33PM *  -2 points [-]

Having trouble googling that. Could you provide a link? Or an explanation, I guess.

ETA: actually, I think I found it.

Comment author: gwern 25 April 2013 06:11:46PM 1 point [-]

Google suggestions: "quarantine fiction", "quarantine wavefunction".

Comment author: MugaSofer 26 April 2013 11:48:46AM 1 point [-]

This comment led to my discovery that the Google settings on this computer were screwy. I think I found it now. Thank you!

Comment author: gwern 26 April 2013 10:08:05PM 0 points [-]

Really? I'm kinda curious, how can Google settings be screwy in such a way that would stop you from finding the top hits?

Comment author: arundelo 27 April 2013 04:36:16AM 2 points [-]
Comment author: [deleted] 27 April 2013 10:27:29AM 1 point [-]

This is probably not the same issue as MugaSofer and arundelo report, but sometimes when I'm on my phone Google notices that I'm in Italy, switches the interface to Italian even though I repeatedly told it that I want it in English, and starts to privilege pages in Italian in the search results by a ginormous amount even when searching for a term in English. (Switching the interface back to English fixes this.)

Comment author: shminux 27 April 2013 01:24:52AM -1 points [-]

A search-redirecting toolbar, perhaps.

Comment author: MugaSofer 29 April 2013 09:00:56AM -2 points [-]

Google will sometimes offer to return pages from the country you're in, which, while useful if you're looking for tourism or whatever, is less helpful if you live in Ireland and the thing you're looking for ... doesn't. I've never used it; this is what I get for using a shared computer.

Comment author: MugaSofer 26 April 2013 11:42:31AM *  0 points [-]

There are many, many works of fiction titled "Quarantine". And your second suggestion throws up all sorts of unrelated stuff.

Comment author: Manfred 12 March 2011 10:28:58AM *  -1 points [-]

This quote does not argue against some major position of modern physicists, but is instead arguing (probably ineffectively) against self-help woo.

Comment author: Cyan 12 March 2011 08:54:00PM *  3 points [-]

Bell made the comment in an article that examined major position of modern phycisists -- or at least, positions of some authors of physics textbooks. Woo was not his topic.

Comment author: Manfred 12 March 2011 11:09:09PM 1 point [-]

None of the physics textbooks I have ever read have required any special qualifications for a system to play the role of measurer, and in many cases use elementary particles as the measurers. There are only three places I recall hearing that claim: Werner Heisenberg, confused non-physicists, and advertising for quantum woo.

Comment author: Cyan 12 March 2011 11:33:03PM 0 points [-]

If you like, PM me an email address and I'll send the article there.

Comment author: Manfred 13 March 2011 04:57:09AM 2 points [-]

Too late, I went and found it online elsewhere :P

In context, the quote is not directed at anyone, and is just a rhetorical question leading straight to "no of course not." Out of context it quite naturally looks like it's directed at some group, changing the meaning a bit.

The quotes from Landau and Lifshitz definitely made me "what," but so did the solutions Bell proposed. 1990 is 20 years ago, I guess.

Comment author: Cyan 14 March 2011 01:20:10AM 1 point [-]

Fair point -- pulling the quote out of context does change the way it comes across. To me, the out-of-context quote seems to target pop sci accounts of QM that talk in a misleading way about observation causing collapse. (The woo account of QM takes this misapprehension and runs with it, so I can see how your original rejoinder came about.)

Comment author: austhinker 14 March 2011 07:06:31AM 0 points [-]

Just remember, 2011 will be 20 years ago in 2031! ;-)

Comment author: Manfred 14 March 2011 07:47:55AM 0 points [-]

It's as it is said: we learn new things all the time, so everything we know now is wrong.