jimrandomh comments on Causality does not imply correlation - Less Wrong

13 Post author: RichardKennaway 08 July 2009 12:52AM

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Comment author: jimrandomh 08 July 2009 01:43:58PM *  6 points [-]

Type error! Causal relationships between booleans imply correlation between them. Causal relationships between numbers imply correlation only if the relation is monotonic. Other types, such as strings, need not even have a meaningful definition of correlation, but they can nevertheless be causally related to eachother.

Comment author: Douglas_Knight 09 July 2009 07:35:25AM 0 points [-]

That is true, but not relevant. These numbers have, I think, as strong an independence as bit strings can have: no bit that can be extracted from A is correlated with a bit that is extracted from B.