buybuydandavis comments on Causation, Probability and Objectivity - Less Wrong

7 Post author: antigonus 18 March 2012 06:54AM

You are viewing a comment permalink. View the original post to see all comments and the full post content.

Comments (32)

You are viewing a single comment's thread. Show more comments above.

Comment author: buybuydandavis 18 March 2012 07:42:32PM 0 points [-]

I guess what I'm really trying to say is that x may only have a causal influence on y if a bunch of other factors are present,

Which can be represented in a straightforward fashion in Jaynes's notation.

f(y | x0, x1=C... xN=C2)

If x "is a cause" of y when x1...xN, then this conditional will accurately predict y without ever saying "cause". The causal talk seems to me superfluous mathematically - it's just describing limiting cases of conditionals.

Comment author: IlyaShpitser 18 March 2012 10:18:29PM *  3 points [-]

If you literally think that conditional probabilities describe causation, then you should water your grass to make it rain (because p(rain | grass-is-wet) is higher than p(rain | grass-is-dry)). Causation is not about prediction.