Correlation does imply some sort of causal link.
For guessing its direction, simple models help you think.
Controlled experiments, if they are well beyond the brink
Of .05 significance will make your unknowns shrink.
Replications prove there’s something new under the sun.
Did one cause the other? Did the other cause the one?
Are they both controlled by something already begun?
Or was it their coincidence that caused it to be done?