## Spencer-Brown’s claimed proof of the four color theorem [closed]

I read on Wikipedia that G. Spencer-Brown gave a non-computer based proof of the four color theorem. As I'm not an expert in the subject I'm unable to verify that claim. Does any one have an idea about the proof or a reference to a serious discussion of the subject?

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The Wikipedia article has links to three papers that discuss the claim. – András Salamon Sep 29 2010 at 20:17
I am not sure that a proof is available online but see lawsofform.org/gsb/nature.html – Tony Huynh Sep 29 2010 at 20:35
Interesting typo in lawsofform.org/gsb/nature.html : "the difficulty of the foul colour problem" :-) – Robin Chapman Sep 29 2010 at 20:40
I do not think MathOverflow should become the go-to place for evaluating other people's mathematical claims (especially if said people have made additional bold claims concerning the Goldbach conjecture and Fermat's last theorem with no evidence of prior mathematical work in that area). I encourage votes to close, and am contemplating deletion. – S. Carnahan Sep 30 2010 at 2:08
Scott, if deletion means that Cam McLeman's answer disappears, I'm against it. – Gerry Myerson Sep 30 2010 at 5:11