Nornagest comments on Probability is Subjectively Objective - Less Wrong

22 Post author: Eliezer_Yudkowsky 14 July 2008 09:16AM

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Comment author: [deleted] 30 September 2013 03:32:15AM 0 points [-]

"Reality is that which, when you stop believing in it, doesn't go away."

By that definition, stuff like the value of the US dollar aren't real.

Comment author: Nornagest 30 September 2013 04:15:08AM 5 points [-]

Whether you personally believe it or not, most gas stations in the US will be happy to exchange $1.50 or thereabouts for a cup of sludgy, lukewarm coffee. That may not be grounded on par with Newton's laws of motion, but it still seems like a step up from, say, body thetans.

Comment author: [deleted] 30 September 2013 03:48:38PM 1 point [-]

That's because the gas station owner still believes in the value of the dollar. But if all of you stopped believing in it...

Comment author: linkhyrule5 30 September 2013 03:55:34PM 1 point [-]

Right, but if I had an effect that depended on massed belief, I'd be pretty sure that existed too.

Say, Discworld-style gods.

(Things that depend on individual belief generally have a low enough prior that I'm probably dreaming/hallucinating, and also I can't tell myself to stop believing in things so whatever it is I think I'm doing it's not "not believing in X".)

Comment author: Nornagest 30 September 2013 05:16:14PM *  1 point [-]

Sure. When we're looking at socially constructed stuff, though, I'm not sure it makes sense to treat its reality as discrete rather than continuous.

It's tempting to use money as a measure of social reality, actually, since it's valuable directly in proportion to people's belief in its value. Unfortunately it's hard to put a dollar value on, say, traffic laws, which share the same property (a point driven home for me the first time I encountered rush-hour traffic in Manila).