gwern comments on Counterfactual resiliency test for non-causal models - Less Wrong

21 Post author: Stuart_Armstrong 30 August 2012 05:30PM

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Comment author: gwern 12 September 2012 02:27:21AM *  1 point [-]

Not just medieval Europe - plenty of urban environments had such trades, like in China, and night soil trades were (and may still be) pretty much universal. The Ancient Roman urine trade gave us the still-current phrase 'money doesn't stink'.