Category Archives: Math

The nominalist trap in Big Data analysis

Nominalism, formerly the novelty of a few, wrote Jorge Luis Borges, today embraces all people; its victory is so vast and fundamental that its name is useless. Nobody declares himself nominalist because there is nobody who is anything else. He didn't go on to write This is why even successful Big Data projects often fail […]

A short note to myself on Propp-Wilson sampling


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Most of the explanations I've read of Propp-Wilson sampling describe the method in terms of "sampling from the past," in order to make sense of the fact that you get your random numbers before attempting to obtain a sample from the target distribution, and don't re-sample them until you succeed (hence the way the Markov […]

The perfectly rational conspiracy theorist


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Conspiracy theorists don't have a rationality problem, they have a priors problem, which is a different beast. Consider a rational person who believes in the existence of a powerful conspiracy, and then reads an arbitrary online article; we'll denote by the propositions describing the conspiracy, and by the propositions describing the article's content. By Bayes' […]