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JoshuaZ comments on Making Beliefs Pay Rent (in Anticipated Experiences): Exercises - Less Wrong Discussion

28 Post author: RobinZ 17 April 2011 03:31PM

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Comment author: JoshuaZ 17 April 2011 04:09:37PM 4 points [-]

3a -edges. This is not such a great answer. One could have an infinite flat plane for example (thus being flat with no edges). Similarly, one could have a hemisphere (not flat but with edges).

Comment author: RobinZ 17 April 2011 05:15:22PM 2 points [-]

I agree that "edges" is a weaker implication of flat-earth than the others - but I don't think it's unjustified. For one thing, the atmosphere is not purely transparent, so it should be impossible to see the sun through it if it were infinite in (horizontal) extent; for another, the sun has to come up somewhere.

These challenges could be evaded by videogame physics, for example, but such would be in conflict with human intuition.