3 ms·

I have no idea what you were saying by "Causation frequently removes correlations that would otherwise exist" then.

• thaumasiotes 4y ago
  Just that. Variables that are causally related frequently show no correlation, or a weak correlation with the opposite sign from the one you would expect. There's already an example sidethread from me - the correlation between the temperature outside a house and the temperature inside a house would ordinarily be close to 1. But a normal modern house tampers with the indoor temperature, reducing the correlation to something close to 0 instead. This is as dramatic of a change in correlation as it's possible to see, altering "basically the same thing" (the correct answer) to "basically unrelated" (correct in an observational sense, but wildly off in a causal sense).