ec429 comments on How to Convince Me That 2 + 2 = 3 - Less Wrong

52 Post author: Eliezer_Yudkowsky 27 September 2007 11:00PM

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Comment author: Eliezer_Yudkowsky 14 September 2011 06:46:09AM 2 points [-]

SS0 isn't a free variable like "x", it is, in any given model of arithmetic, the unique object related by the successor relation to the unique object related by the successor relation to the unique object which is not related by the successor relation to any object, which is how mathematicians say "Two".

Comment author: ec429 14 September 2011 06:59:07AM 2 points [-]

Although as a mathmo myself I should point out that, to save time, we usually pronounce it "Two". :)