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simplicio comments on Self-fulfilling correlations - Less Wrong

103 Post author: PhilGoetz 26 August 2010 09:07PM

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Comment author: simplicio 01 September 2010 11:19:37PM 3 points [-]

A minor pedantry; this was a wonderful post:

Sometimes corr(X,Y) means X=>Y...

corr(X,Y) is a number between -1 and 1, and without specifying its value it's hard to see how it could imply anything. Perhaps it would be better stated as something like

Sometimes corr(X,Y) > 0 means that X=>Y...

Comment author: Osuniev 07 March 2013 02:46:45PM 0 points [-]

Well since he starts the sentence with SOMETIMES,wether it's negative or positive his sentence is correct. I guess you could nitpick on insisting that corr(X,Y) != 0 ...